init

.forgejo/workflows/build.yml

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+name: Auto Build caddy-shork Docker Container
+enable-email-notifications: true
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '12 */3 * * *'
+
+jobs:
+  build:
+    runs-on: dind
+
+    env:
+      PACKAGE: caddy-shork
+      DOCKER_REGISTRY: git.shork.ch
+      REGISTRY_USER: docker-images
+      COMMIT_AUTHOR_NAME: "forgejo-runner"
+      COMMIT_AUTHOR_EMAIL: "forgejo-runner@shork.ch"
+      COMMIT_MESSAGE: "Update build metadata"
+      CADDY_APPS: ""
+      REBUILD_ALL_X_DAYS: 14
+
+    steps:
+      - name: Install dependencies
+        shell: sh
+        run: |
+          echo "Run because of ${{ github.event_name }}"
+          apk add --no-cache git nodejs npm bash sed curl jq xcaddy
+
+      - uses: actions/checkout@v3
+
+      - name: Start Docker daemon
+        run: |
+          dockerd-entrypoint.sh &
+          for i in {1..10}; do
+            docker info && break
+            echo "Waiting for Docker daemon..."
+            sleep 3
+          done
+          docker info || { echo "Docker daemon failed to start."; exit 1; }
+
+      - name: Build and push Docker image
+        run: |
+          xcaddy_cmd="xcaddy build"
+          for app in $CADDY_APPS; do xcaddy_cmd+=" --with $app"; done
+          escaped_cmd=$(printf '%s\n' "$xcaddy_cmd" | sed 's/[\/&]/\\&/g')
+          sed -i "s|\$XCADDY_CMD|$escaped_cmd|g" Dockerfile
+          docker build --build-arg NPROC=1 -t $DOCKER_REGISTRY/$REGISTRY_USER/$PACKAGE:latest .
+          echo "${{ secrets.DOCKER_PASSWORD }}" | docker login $DOCKER_REGISTRY -u $REGISTRY_USER --password-stdin
+          docker push --all-tags $DOCKER_REGISTRY/$REGISTRY_USER/$PACKAGE

Dockerfile

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+FROM caddy:builder AS builder
+
+$XCADDY_CMD
+
+FROM caddy:latest
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy