Add a docker build step.

.forgejo/workflows/ci.yml

@@ -86,4 +86,82 @@ jobs:
     - name: Test
       run: npm run test
       working-directory: frontend
+
+  docker-backend:
+    name: Build and Push Backend Image
+    runs-on: docker
+    needs: [check-backend]
+    if: github.ref == 'refs/heads/main'
+    steps:
+    - name: Checkout Repo
+      uses: https://github.com/actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: https://github.com/docker/setup-buildx-action@v3
+
+    - name: Login to Forgejo Container Registry
+      uses: https://github.com/docker/login-action@v3
+      with:
+        registry: ${{ gitea.server_url }}
+        username: ${{ gitea.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata
+      id: meta
+      uses: https://github.com/docker/metadata-action@v5
+      with:
+        images: ${{ gitea.server_url }}/${{ gitea.repository }}/backend
+        tags: |
+          type=ref,event=branch
+          type=sha,prefix={{branch}}-
+          type=raw,value=latest,enable={{is_default_branch}}
+
+    - name: Build and push image
+      uses: https://github.com/docker/build-push-action@v5
+      with:
+        context: ./backend
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+  docker-frontend:
+    name: Build and Push Frontend Image
+    runs-on: docker
+    needs: [check-frontend]
+    if: github.ref == 'refs/heads/main'
+    steps:
+    - name: Checkout Repo
+      uses: https://github.com/actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: https://github.com/docker/setup-buildx-action@v3
+
+    - name: Login to Forgejo Container Registry
+      uses: https://github.com/docker/login-action@v3
+      with:
+        registry: ${{ gitea.server_url }}
+        username: ${{ gitea.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata
+      id: meta
+      uses: https://github.com/docker/metadata-action@v5
+      with:
+        images: ${{ gitea.server_url }}/${{ gitea.repository }}/frontend
+        tags: |
+          type=ref,event=branch
+          type=sha,prefix={{branch}}-
+          type=raw,value=latest,enable={{is_default_branch}}
+
+    - name: Build and push image
+      uses: https://github.com/docker/build-push-action@v5
+      with:
+        context: ./frontend
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max