fix: restructure templates for devcontainer CLI compatibility

Templates now have .devcontainer subfolder as required by the spec

Author: Pikatsuto

.devcontainer/base-with-bmad/Dockerfile …/base-with-bmad/.devcontainer/Dockerfile.devcontainer/base-with-bmad/Dockerfile renamed to .devcontainer/base-with-bmad/.devcontainer/Dockerfile .devcontainer/base-with-bmad/Dockerfile renamed to .devcontainer/base-with-bmad/.devcontainer/Dockerfile

@@ -27,9 +27,9 @@ jobs:
       - name: Find all Dockerfiles
         id: find
         run: |
-          # Find all directories containing a Dockerfile
-          CONTAINERS=$(find .devcontainer -mindepth 2 -name "Dockerfile" -printf '%h\n' | \
-            sed 's|.devcontainer/||' | \
+          # Find all template directories containing a Dockerfile
+          CONTAINERS=$(find .devcontainer -mindepth 3 -name "Dockerfile" -printf '%h\n' | \
+            sed 's|.devcontainer/||' | sed 's|/.devcontainer||' | \
             jq -R -s -c 'split("\n") | map(select(length > 0))')
           echo "containers=$CONTAINERS" >> $GITHUB_OUTPUT
           echo "Found containers: $CONTAINERS"
@@ -182,8 +182,8 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v5
         with:
-          context: .devcontainer/${{ matrix.container }}
-          file: .devcontainer/${{ matrix.container }}/Dockerfile
+          context: .devcontainer/${{ matrix.container }}/.devcontainer
+          file: .devcontainer/${{ matrix.container }}/.devcontainer/Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: |

…ntainer/base-with-bmad/devcontainer.json …ith-bmad/.devcontainer/devcontainer.json.devcontainer/base-with-bmad/devcontainer.json renamed to .devcontainer/base-with-bmad/.devcontainer/devcontainer.json .devcontainer/base-with-bmad/devcontainer.json renamed to .devcontainer/base-with-bmad/.devcontainer/devcontainer.json

@@ -30,14 +30,14 @@ Dev Container templates with Claude Code pre-installed on Debian 13 (Trixie).
 
 ### Option 2: Copy the devcontainer folder
 
-Copy the desired template folder from `.devcontainer/` to your project:
+Copy the desired template's `.devcontainer` folder to your project:
 
 ```bash
 # For base template
-cp -r .devcontainer/base /your-project/.devcontainer
+cp -r .devcontainer/base/.devcontainer /your-project/.devcontainer
 
 # For BMAD template
-cp -r .devcontainer/base-with-bmad /your-project/.devcontainer
+cp -r .devcontainer/base-with-bmad/.devcontainer /your-project/.devcontainer
 ```
 
 ### Option 3: Use the image directly
@@ -103,12 +103,14 @@ echo $GITHUB_TOKEN | docker login ghcr.io -u USERNAME --password-stdin
 .
 ├── .devcontainer/
 │   ├── base/
-│   │   ├── Dockerfile
-│   │   ├── devcontainer.json
+│   │   ├── .devcontainer/
+│   │   │   ├── Dockerfile
+│   │   │   └── devcontainer.json
 │   │   └── devcontainer-template.json
 │   └── base-with-bmad/
-│       ├── Dockerfile
-│       ├── devcontainer.json
+│       ├── .devcontainer/
+│       │   ├── Dockerfile
+│       │   └── devcontainer.json
 │       └── devcontainer-template.json
 ├── .github/
 │   └── workflows/