Remove tem. backend deployment from actions and add docker context to frontend build

.gitea/workflows/demo.yaml

@@ -42,33 +42,8 @@ jobs:
       - name: Build and Push Latest Docker Image
         id: build-and-push-latest
         uses: docker/build-push-action@v4
-        if: ${{ github.ref == 'refs/heads/master' }}
+        if: ${{ github.ref == 'refs/heads/docker-deployment' }}
         with:
           file: frontend/Dockerfile
           push: true
           tags: git.fawkes100.de/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/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/master' }}
-        with:
-          file: backend/Dockerfile
-          push: true
-          tags: git.fawkes100.de/timemanager/timemanager-backend:latest