dockerindocker test

.forgejo/workflows/dockerindocker.yml

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+# Workflow name
+name: Build and Push Docker-in-Docker Container
+
+# Run-name for each workflow run
+run-name: Build and Push Docker-in-Docker Container for ${{ github.ref_name }}
+
+# Triggers for the workflow
+on:
+  # On pushes to the main branch if relevant files change
+  push:
+    branches:
+    - main
+    paths:
+    - 'containers/dockerindocker/**'
+    - '.forgejo/workflows/dockerindocker.yml'
+  # Allows manual triggering from the Forgejo UI
+  workflow_dispatch: {}
+  # Scheduled run every Friday at 8 PM UTC
+  schedule:
+  - cron: '0 20 * * 5'
+
+jobs:
+  build-and-push:
+    # Strategy to build for multiple architectures
+    strategy:
+      matrix:
+        arch: [ amd64, arm64 ]
+    # Use a runner that matches the architecture.
+    # This assumes you have runners tagged with 'amd64' and 'arm64'.
+    runs-on: ${{ matrix.arch }}
+    steps:
+    # 1. Check out the repository code
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    # 2. Set up Docker Buildx for multi-platform builds
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    # 3. Login to the Forgejo container registry
+    #    Requires CI_REGISTRY, CI_REGISTRY_USER, and CI_TOKEN secrets to be set in Forgejo.
+    - name: Login to Forgejo Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ secrets.CI_REGISTRY }}
+        username: ${{ secrets.CI_REGISTRY_USER }}
+        password: ${{ secrets.CI_TOKEN }}
+
+    # 4. Build and push the Docker image for the specific architecture
+    - name: Build and push (${{ matrix.arch }})
+      uses: docker/build-push-action@v5
+      with:
+        context: ./containers/dockerindocker/
+        file: ./containers/dockerindocker/Dockerfile
+        platforms: linux/${{ matrix.arch }}
+        push: true
+        tags: |
+          ${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:${{ matrix.arch }}-latest
+        # Enable caching to speed up subsequent builds
+        cache-from: type=registry,ref=${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:buildcache-${{ matrix.arch }}
+        cache-to: type=registry,ref=${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:buildcache-${{ matrix.arch }},mode=max
+
+  # This job runs after all 'build-and-push' jobs have succeeded
+  create-manifest:
+    needs: build-and-push
+    # A standard runner is sufficient for creating a manifest
+    runs-on: amd64
+    steps:
+    # 1. Login to the Forgejo container registry again
+    - name: Login to Forgejo Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ secrets.CI_REGISTRY }}
+        username: ${{ secrets.CI_REGISTRY_USER }}
+        password: ${{ secrets.CI_TOKEN }}
+
+    # 2. Create and push the multi-arch manifest
+    #    This combines the amd64 and arm64 images under a single 'latest' tag.
+    - name: Create and push multi-arch manifest
+      run: |
+        docker manifest create ${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:latest \
+          --amend ${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:amd64-latest \
+          --amend ${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:arm64-latest
+        docker manifest push ${{ secrets.CI_REGISTRY }}/${{ secrets.CI_REPOSITORY }}/dockerindocker:latest

containers/dockerindocker/Dockerfile

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+FROM alpine:edge
+
+RUN apk --no-cache add docker docker-compose openssh-client ansible nodejs npm
+
+WORKDIR /app
+
+CMD [ "dockerd" ]