diff --git a/.env.test b/.env.test
new file mode 100644
index 0000000..24a43c0
--- /dev/null
+++ b/.env.test
@@ -0,0 +1,4 @@
+# define your env variables for the test env here
+KERNEL_CLASS='App\Kernel'
+APP_SECRET='$ecretf0rt3st'
+SYMFONY_DEPRECATIONS_HELPER=999999
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..3b10734
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,38 @@
+name: CI
+
+on:
+  push:
+
+jobs:
+  checks:
+    name: Run checks
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and start containers
+        run: docker compose up -d --build
+
+      - name: Wait for services
+        run: sleep 5
+
+      - name: Composer install
+        run: docker compose exec app composer install --no-progress --no-suggest --prefer-dist --optimize-autoloader
+
+      - name: Run PHPUnit
+        run: docker compose exec app ./vendor/bin/phpunit --no-progress --colors=never
+
+      - name: Run PHPStan
+        run: docker compose exec app ./vendor/bin/phpstan analyse src tests --level=max --no-progress
+
+      - name: Run ECS
+        run: docker compose exec app ./vendor/bin/ecs --fix
+
+      - name: Stop containers
+        if: always()
+        run: docker compose down --remove-orphans
diff --git a/.gitignore b/.gitignore
index 8229949..a61c8b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,5 @@
 /vendor/
 ###< symfony/framework-bundle ###
 
+/.phpunit.cache/
+/.phpunit.result.cache
diff --git a/Makefile b/Makefile
index 51bb5e1..d09bba2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # Executables (local)
-DOCKER_COMP = docker-compose
+DOCKER_COMP = docker compose
 
 # Docker containers
 PHP_CONT = $(DOCKER_COMP) exec app
@@ -35,6 +35,19 @@ logs: ## Show live logs
 bash: ## Connect to the PHP FPM container
 	@$(PHP_CONT) bash
 
+phpunit:
+	@$(PHP_CONT) ./vendor/bin/phpunit --no-progress --colors=never
+
+phpstan:
+	@$(PHP_CONT) ./vendor/bin/phpstan analyse src tests --level=max --no-progress
+
+ecs-fix:
+	@$(PHP_CONT) ./vendor/bin/ecs --fix
+
+ecs:
+	@$(PHP_CONT) ./vendor/bin/ecs
+
+
 ## —— Composer 🧙 ——————————————————————————————————————————————————————————————
 composer: ## Run composer, pass the parameter "c=" to run a given command, example: make composer c='req symfony/orm-pack'
 	@$(eval c ?=)
diff --git a/composer.json b/composer.json
index 12e8225..f2ce63f 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,9 @@
         "symfony/yaml": "8.0.*"
     },
     "require-dev": {
+        "phpstan/phpstan": "^1.10",
+        "phpunit/phpunit": "^10.0",
+        "symplify/easy-coding-standard": "^13.0"
     },
     "config": {
         "allow-plugins": {
@@ -26,7 +29,8 @@
     },
     "autoload": {
         "psr-4": {
-            "App\\": "src/"
+            "App\\": "src/",
+            "Tests\\": "tests/"
         }
     },
     "autoload-dev": {
diff --git a/composer.lock b/composer.lock
index 96adeca..e6e8b4a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f86b9289ceb7ed35082501128e0a8027",
+    "content-hash": "3ebac0045221c985355d6dc186dccb9c",
     "packages": [
         {
             "name": "psr/cache",
@@ -2466,7 +2466,1791 @@
             "time": "2025-12-04T18:17:06+00:00"
         }
     ],
-    "packages-dev": [],
+    "packages-dev": [
+        {
+            "name": "myclabs/deep-copy",
+            "version": "1.13.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/DeepCopy.git",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "reference": "07d290f0c47959fd5eed98c95ee5602db07e0b6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "conflict": {
+                "doctrine/collections": "<1.6.8",
+                "doctrine/common": "<2.13.3 || >=3 <3.2.2"
+            },
+            "require-dev": {
+                "doctrine/collections": "^1.6.8",
+                "doctrine/common": "^2.13.3 || ^3.2.2",
+                "phpspec/prophecy": "^1.10",
+                "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ],
+                "psr-4": {
+                    "DeepCopy\\": "src/DeepCopy/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
+            ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.13.4"
+            },
+            "funding": [
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-01T08:46:24+00:00"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v5.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "reference": "dca41cd15c2ac9d055ad70dbfd011130757d1f82",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "php": ">=7.4"
+            },
+            "require-dev": {
+                "ircmaxell/php-yacc": "^0.0.7",
+                "phpunit/phpunit": "^9.0"
+            },
+            "bin": [
+                "bin/php-parse"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpParser\\": "lib/PhpParser"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/nikic/PHP-Parser/issues",
+                "source": "https://github.com/nikic/PHP-Parser/tree/v5.7.0"
+            },
+            "time": "2025-12-06T11:56:16+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/manifest.git",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/54750ef60c58e43759730615a392c31c80e23176",
+                "reference": "54750ef60c58e43759730615a392c31c80e23176",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-phar": "*",
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "support": {
+                "issues": "https://github.com/phar-io/manifest/issues",
+                "source": "https://github.com/phar-io/manifest/tree/2.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-03T12:33:53+00:00"
+        },
+        {
+            "name": "phar-io/version",
+            "version": "3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phar-io/version.git",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Heuer",
+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Library for handling version information and constraints",
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
+            },
+            "time": "2022-02-21T01:04:05+00:00"
+        },
+        {
+            "name": "phpstan/phpstan",
+            "version": "1.12.32",
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/2770dcdf5078d0b0d53f94317e06affe88419aa8",
+                "reference": "2770dcdf5078d0b0d53f94317e06affe88419aa8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2|^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan-shim": "*"
+            },
+            "bin": [
+                "phpstan",
+                "phpstan.phar"
+            ],
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "PHPStan - PHP Static Analysis Tool",
+            "keywords": [
+                "dev",
+                "static analysis"
+            ],
+            "support": {
+                "docs": "https://phpstan.org/user-guide/getting-started",
+                "forum": "https://github.com/phpstan/phpstan/discussions",
+                "issues": "https://github.com/phpstan/phpstan/issues",
+                "security": "https://github.com/phpstan/phpstan/security/policy",
+                "source": "https://github.com/phpstan/phpstan-src"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/ondrejmirtes",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/phpstan",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-09-30T10:16:31+00:00"
+        },
+        {
+            "name": "phpunit/php-code-coverage",
+            "version": "10.1.16",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
+                "reference": "7e308268858ed6baedc8704a304727d20bc07c77"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/7e308268858ed6baedc8704a304727d20bc07c77",
+                "reference": "7e308268858ed6baedc8704a304727d20bc07c77",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
+                "ext-xmlwriter": "*",
+                "nikic/php-parser": "^4.19.1 || ^5.1.0",
+                "php": ">=8.1",
+                "phpunit/php-file-iterator": "^4.1.0",
+                "phpunit/php-text-template": "^3.0.1",
+                "sebastian/code-unit-reverse-lookup": "^3.0.0",
+                "sebastian/complexity": "^3.2.0",
+                "sebastian/environment": "^6.1.0",
+                "sebastian/lines-of-code": "^2.0.2",
+                "sebastian/version": "^4.0.1",
+                "theseer/tokenizer": "^1.2.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.1"
+            },
+            "suggest": {
+                "ext-pcov": "PHP extension that provides line coverage",
+                "ext-xdebug": "PHP extension that provides line coverage as well as branch and path coverage"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "10.1.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
+                "coverage",
+                "testing",
+                "xunit"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
+                "security": "https://github.com/sebastianbergmann/php-code-coverage/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/10.1.16"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-08-22T04:31:57+00:00"
+        },
+        {
+            "name": "phpunit/php-file-iterator",
+            "version": "4.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
+                "reference": "a95037b6d9e608ba092da1b23931e537cadc3c3c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/a95037b6d9e608ba092da1b23931e537cadc3c3c",
+                "reference": "a95037b6d9e608ba092da1b23931e537cadc3c3c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "FilterIterator implementation that filters files based on a list of suffixes.",
+            "homepage": "https://github.com/sebastianbergmann/php-file-iterator/",
+            "keywords": [
+                "filesystem",
+                "iterator"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
+                "security": "https://github.com/sebastianbergmann/php-file-iterator/security/policy",
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/4.1.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-08-31T06:24:48+00:00"
+        },
+        {
+            "name": "phpunit/php-invoker",
+            "version": "4.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-invoker.git",
+                "reference": "f5e568ba02fa5ba0ddd0f618391d5a9ea50b06d7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-invoker/zipball/f5e568ba02fa5ba0ddd0f618391d5a9ea50b06d7",
+                "reference": "f5e568ba02fa5ba0ddd0f618391d5a9ea50b06d7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "ext-pcntl": "*",
+                "phpunit/phpunit": "^10.0"
+            },
+            "suggest": {
+                "ext-pcntl": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Invoke callables with a timeout",
+            "homepage": "https://github.com/sebastianbergmann/php-invoker/",
+            "keywords": [
+                "process"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-invoker/issues",
+                "source": "https://github.com/sebastianbergmann/php-invoker/tree/4.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T06:56:09+00:00"
+        },
+        {
+            "name": "phpunit/php-text-template",
+            "version": "3.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-text-template.git",
+                "reference": "0c7b06ff49e3d5072f057eb1fa59258bf287a748"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-text-template/zipball/0c7b06ff49e3d5072f057eb1fa59258bf287a748",
+                "reference": "0c7b06ff49e3d5072f057eb1fa59258bf287a748",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Simple template engine.",
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+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "5.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Volker Dusch",
+                    "email": "github@wallbash.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                },
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Provides the functionality to export PHP variables for visualization",
+            "homepage": "https://www.github.com/sebastianbergmann/exporter",
+            "keywords": [
+                "export",
+                "exporter"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/exporter/issues",
+                "security": "https://github.com/sebastianbergmann/exporter/security/policy",
+                "source": "https://github.com/sebastianbergmann/exporter/tree/5.1.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/sebastian/exporter",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-09-24T06:09:11+00:00"
+        },
+        {
+            "name": "sebastian/global-state",
+            "version": "6.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/global-state.git",
+                "reference": "987bafff24ecc4c9ac418cab1145b96dd6e9cbd9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/987bafff24ecc4c9ac418cab1145b96dd6e9cbd9",
+                "reference": "987bafff24ecc4c9ac418cab1145b96dd6e9cbd9",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "sebastian/object-reflector": "^3.0",
+                "sebastian/recursion-context": "^5.0"
+            },
+            "require-dev": {
+                "ext-dom": "*",
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Snapshotting of global state",
+            "homepage": "https://www.github.com/sebastianbergmann/global-state",
+            "keywords": [
+                "global state"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/global-state/issues",
+                "security": "https://github.com/sebastianbergmann/global-state/security/policy",
+                "source": "https://github.com/sebastianbergmann/global-state/tree/6.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-02T07:19:19+00:00"
+        },
+        {
+            "name": "sebastian/lines-of-code",
+            "version": "2.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/lines-of-code.git",
+                "reference": "856e7f6a75a84e339195d48c556f23be2ebf75d0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/lines-of-code/zipball/856e7f6a75a84e339195d48c556f23be2ebf75d0",
+                "reference": "856e7f6a75a84e339195d48c556f23be2ebf75d0",
+                "shasum": ""
+            },
+            "require": {
+                "nikic/php-parser": "^4.18 || ^5.0",
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library for counting the lines of code in PHP source code",
+            "homepage": "https://github.com/sebastianbergmann/lines-of-code",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/lines-of-code/issues",
+                "security": "https://github.com/sebastianbergmann/lines-of-code/security/policy",
+                "source": "https://github.com/sebastianbergmann/lines-of-code/tree/2.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-12-21T08:38:20+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "5.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "202d0e344a580d7f7d04b3fafce6933e59dae906"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/202d0e344a580d7f7d04b3fafce6933e59dae906",
+                "reference": "202d0e344a580d7f7d04b3fafce6933e59dae906",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "sebastian/object-reflector": "^3.0",
+                "sebastian/recursion-context": "^5.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/5.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T07:08:32+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "24ed13d98130f0e7122df55d06c5c4942a577957"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/24ed13d98130f0e7122df55d06c5c4942a577957",
+                "reference": "24ed13d98130f0e7122df55d06c5c4942a577957",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/3.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T07:06:18+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "5.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "47e34210757a2f37a97dcd207d032e1b01e64c7a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/47e34210757a2f37a97dcd207d032e1b01e64c7a",
+                "reference": "47e34210757a2f37a97dcd207d032e1b01e64c7a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "https://github.com/sebastianbergmann/recursion-context",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "security": "https://github.com/sebastianbergmann/recursion-context/security/policy",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/5.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/sebastian/recursion-context",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-08-10T07:50:56+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "4.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "462699a16464c3944eefc02ebdd77882bd3925bf"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/462699a16464c3944eefc02ebdd77882bd3925bf",
+                "reference": "462699a16464c3944eefc02ebdd77882bd3925bf",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "source": "https://github.com/sebastianbergmann/type/tree/4.0.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T07:10:45+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "4.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "c51fa83a5d8f43f1402e3f32a005e6262244ef17"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/c51fa83a5d8f43f1402e3f32a005e6262244ef17",
+                "reference": "c51fa83a5d8f43f1402e3f32a005e6262244ef17",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "source": "https://github.com/sebastianbergmann/version/tree/4.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-07T11:34:05+00:00"
+        },
+        {
+            "name": "symplify/easy-coding-standard",
+            "version": "13.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/easy-coding-standard/easy-coding-standard.git",
+                "reference": "5c7e7a07e5d6a98b9dd2e6fc0a9155efb7c166c8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/easy-coding-standard/easy-coding-standard/zipball/5c7e7a07e5d6a98b9dd2e6fc0a9155efb7c166c8",
+                "reference": "5c7e7a07e5d6a98b9dd2e6fc0a9155efb7c166c8",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "conflict": {
+                "friendsofphp/php-cs-fixer": "<3.92.4",
+                "phpcsstandards/php_codesniffer": "<4.0.1",
+                "symplify/coding-standard": "<12.1"
+            },
+            "suggest": {
+                "ext-dom": "Needed to support checkstyle output format in class CheckstyleOutputFormatter"
+            },
+            "bin": [
+                "bin/ecs"
+            ],
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Use Coding Standard with 0-knowledge of PHP-CS-Fixer and PHP_CodeSniffer",
+            "keywords": [
+                "Code style",
+                "automation",
+                "fixer",
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/easy-coding-standard/easy-coding-standard/issues",
+                "source": "https://github.com/easy-coding-standard/easy-coding-standard/tree/13.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://www.paypal.me/rectorphp",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/tomasvotruba",
+                    "type": "github"
+                }
+            ],
+            "time": "2026-01-05T09:10:04+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/b7489ce515e168639d17feec34b8847c326b0b3c",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.3.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-11-17T20:03:58+00:00"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": [],
diff --git a/docker-compose.yml b/docker-compose.yml
index 791fa9c..6a4587a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,3 @@
-version: "3.8"
 services:
 
     # PHP service
diff --git a/ecs.php b/ecs.php
new file mode 100644
index 0000000..80e47e8
--- /dev/null
+++ b/ecs.php
@@ -0,0 +1,16 @@
+<?php
+
+use Symplify\EasyCodingStandard\Config\ECSConfig;
+use Symplify\EasyCodingStandard\ValueObject\Set\SetList;
+
+return static function (ECSConfig $ecsConfig): void {
+    $ecsConfig->paths([
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ]);
+
+    $ecsConfig->sets([
+        SetList::PSR_12,
+        SetList::COMMON,
+    ]);
+};
diff --git a/phpstan.dist.neon b/phpstan.dist.neon
new file mode 100644
index 0000000..e0de575
--- /dev/null
+++ b/phpstan.dist.neon
@@ -0,0 +1,8 @@
+parameters:
+    level: 6
+    paths:
+        - bin/
+        - config/
+        - public/
+        - src/
+        - tests/
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..a1c637a
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,4 @@
+parameters:
+  level: max
+  paths:
+    - src
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..211381d
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php" colors="true">
+  <testsuites>
+    <testsuite name="Project Test Suite">
+      <directory>./tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..211381d
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php" colors="true">
+  <testsuites>
+    <testsuite name="Project Test Suite">
+      <directory>./tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/src/Example.php b/src/Example.php
new file mode 100644
index 0000000..48c5bc3
--- /dev/null
+++ b/src/Example.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace App;
+
+class Example
+{
+    /**
+     * @param  int[]  $numbers
+     */
+    public function sum(array $numbers): int
+    {
+        $total = 0;
+        foreach ($numbers as $n) {
+            $total += $n;
+        }
+
+        return $total;
+    }
+}
diff --git a/symfony.lock b/symfony.lock
index 6cd0224..0e7f64a 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -1,4 +1,30 @@
 {
+    "phpstan/phpstan": {
+        "version": "1.12",
+        "recipe": {
+            "repo": "github.com/symfony/recipes-contrib",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "5e490cc197fb6bb1ae22e5abbc531ddc633b6767"
+        },
+        "files": [
+            "phpstan.dist.neon"
+        ]
+    },
+    "phpunit/phpunit": {
+        "version": "10.5",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "10.0",
+            "ref": "bb22cf8d8c554a623b427d5f3416b538f5525233"
+        },
+        "files": [
+            ".env.test",
+            "phpunit.xml.dist",
+            "tests/bootstrap.php"
+        ]
+    },
     "symfony/console": {
         "version": "6.3",
         "recipe": {
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
new file mode 100644
index 0000000..6269128
--- /dev/null
+++ b/tests/ExampleTest.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Tests;
+
+use App\Example;
+use PHPUnit\Framework\TestCase;
+
+class ExampleTest extends TestCase
+{
+    public function testSum(): void
+    {
+        $calc = new Example();
+        $this->assertSame(10, $calc->sum([1, 2, 3, 4]));
+    }
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..a30ba4d
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,13 @@
+<?php
+
+use Symfony\Component\Dotenv\Dotenv;
+
+require dirname(__DIR__) . '/vendor/autoload.php';
+
+if (method_exists(Dotenv::class, 'bootEnv')) {
+    (new Dotenv())->bootEnv(dirname(__DIR__) . '/.env');
+}
+
+if ($_SERVER['APP_DEBUG']) {
+    umask(0000);
+}