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.github/workflows/BuildAndPushCotnainer.yml

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+name: Build and Push Docker Image
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}/backend
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels)
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha,format=short
+            type=ref,event=branch
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./schafkopf-frontend
+          file: ./schafkopf-frontend/Dockerfile
+          push: true
+          # Always push the normal tags; if this is a master push, 
+          # prepend "latest" to the list.
+          tags: ${{ github.ref == 'refs/heads/master' && format('{0},latest', steps.meta.outputs.tags) || steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}