Build backend automatic

.gitea/workflows/demo.yaml

@@ -48,3 +48,29 @@ jobs:
           file: frontend/Dockerfile
           push: true
           tags: git.fawkes100.de/sebastian/timemanager/timemanager-frontend:latest
+  build-and-push-backend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Log into registry at Gitea
+        uses: docker/login-action@v2
+        with:
+          registry: https://git.fawkes100.de
+          username: ${{ secrets.REGISTRY_USER }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v2
+        with:
+          images: git.fawkes100.de/sebastian/timemanager/timemanager-backend
+      - name: Build and Push Latest Docker Image
+        id: build-and-push-latest
+        uses: docker/build-push-action@v4
+        if: ${{ github.ref == 'refs/heads/docker-deployment' }}
+        with:
+          context: backend/.
+          file: backend/Dockerfile
+          push: true
+          tags: git.fawkes100.de/sebastian/timemanager/timemanager-backend:latest