docs(about): about ff4j-spring-boot-starters

docs/pages/about/advanced-concepts/spring-boot/index.md

@@ -1 +1,101 @@
-We know that you are waiting, we will have this section ready very soon.
+# Spring Boot
+
+FF4j provides Spring Boot starters that help integrate FF4j into a Spring Boot
+application. The starters provide auto-configuration for FF4j, making it easy to set up and use. With
+the starters, you can easily enable or disable features in your application based on the
+configuration of FF4j.
+
+## Overview
+
+FF4j provides two Spring Boot starters:
+
+- [`ff4j-spring-boot-starter-webmvc`](https://github.com/ff4j/ff4j-spring-boot-starter-parent?tab=readme-ov-file#ff4j-spring-boot-starter-webmvc) -
+  The starter for Spring MVC applications.
+- [`ff4j-spring-boot-starter-webflux`](https://github.com/ff4j/ff4j-spring-boot-starter-parent?tab=readme-ov-file#ff4j-spring-boot-starter-webflux) -
+  The starter for Spring WebFlux applications.
+
+| Feature               |  ff4j-spring-boot-starter-webmvc  | ff4j-spring-boot-starter-webflux  |
+|-----------------------|:---------------------------------:|:---------------------------------:|
+| RESTful APIs          |                 ✅                 |                 ✅                 |
+| OpenAPI Documentation |                 ✅                 |                 ✅                 |
+| Web Console           |                 ✅                 |                 ❌                  |
+
+## Sample
+
+### With `ff4j-spring-boot-starter-webmvc`
+
+!!! info
+
+    The complete sample is available in the [ff4j-spring-boot-starter-webmvc-sample](https://github.com/ff4j/ff4j-samples/tree/master/ff4j-spring-boot-samples/ff4j-spring-boot-starter-webmvc-sample)
+
+=== "1. Dependency"
+
+    Add the dependency `ff4j-spring-boot-starter-webmvc`
+
+    ```xml title="pom.xml"
+    <dependency>
+      <groupId>org.ff4j</groupId>
+      <artifactId>ff4j-spring-boot-starter-webmvc</artifactId>
+      <version>${ff4j.version}</version>
+    </dependency>
+    ```
+
+=== "2. Configuration"
+
+    Configure FF4j
+
+    ```kotlin title="FF4JConfiguration.kt"
+    import org.ff4j.FF4j
+    import org.ff4j.conf.XmlParser
+    import org.springframework.context.annotation.Bean
+    import org.springframework.context.annotation.Configuration
+
+    @Configuration
+    class FF4JConfiguration {
+      @Bean
+      fun getFF4J(): FF4j = FF4j(XmlParser(), "ff4j-features.xml")
+    }
+    ```
+
+=== "3. Bootstrap"
+
+    Run the application with `mvn spring-boot:run` and access the FF4j web console at `http://localhost:8080/ff4j-console`
+
+### With `ff4j-spring-boot-starter-webflux`
+
+!!! info
+
+    The complete sample is available in the [ff4j-spring-boot-starter-webflux-sample](https://github.com/ff4j/ff4j-samples/tree/master/ff4j-spring-boot-samples/ff4j-spring-boot-starter-webflux-sample)
+
+=== "1. Dependency"
+
+    Add the dependency `ff4j-spring-boot-starter-webflux`
+
+    ```xml title="pom.xml"
+    <dependency>
+      <groupId>org.ff4j</groupId>
+      <artifactId>ff4j-spring-boot-starter-webflux</artifactId>
+      <version>${ff4j.version}</version>
+    </dependency>
+    ```
+
+=== "2. Configuration"
+
+    Configure FF4j
+
+    ```kotlin title="FF4JConfiguration.kt"
+    import org.ff4j.FF4j
+    import org.ff4j.conf.XmlParser
+    import org.springframework.context.annotation.Bean
+    import org.springframework.context.annotation.Configuration
+
+    @Configuration
+    class FF4JConfiguration {
+      @Bean
+      fun getFF4J(): FF4j = FF4j(XmlParser(), "ff4j-features.xml")
+    }
+    ```
+
+=== "3. Bootstrap"
+
+    Run the application with `mvn spring-boot:run` and access the FF4j web api at `http://localhost:8080/swagger-ui/index.html`