Use buildkit for image building

.gitea/workflows/build-deploy.yml

@@ -0,0 +1,57 @@
+name: Build and Deploy with Buildkit
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-deploy:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+    
+    - name: Set up Buildx (buildkit)
+      run: |
+        # 安裝 buildx
+        mkdir -p ~/.docker/cli-plugins
+        curl https://github.com/docker/buildx/releases/download/v0.12.0/buildx-v0.12.0.linux-amd64 -L -o ~/.docker/cli-plugins/docker-buildx
+        chmod +x ~/.docker/cli-plugins/docker-buildx
+    
+    - name: Build with buildkit (no docker daemon needed)
+      run: |
+        # 啟用 buildx builder
+        docker buildx create --use --name=buildkit-runner 2>/dev/null || docker buildx use buildkit-runner
+        
+        # 構建後端
+        docker buildx build \
+          --load \
+          -t cloudforge-dashboard-backend:${{ github.sha }} \
+          -t cloudforge-dashboard-backend:latest \
+          ./dashboard-backend
+        
+        # 構建前端
+        docker buildx build \
+          --load \
+          -t cloudforge-dashboard-frontend:${{ github.sha }} \
+          -t cloudforge-dashboard-frontend:latest \
+          ./dashboard-frontend
+    
+    - name: Verify images
+      run: |
+        docker images | grep cloudforge
+        echo "✅ Images built successfully"
+    
+    - name: Save images
+      run: |
+        # 保存為 tar，用於後續部署
+        mkdir -p /tmp/images
+        docker save cloudforge-dashboard-backend:latest -o /tmp/images/backend.tar
+        docker save cloudforge-dashboard-frontend:latest -o /tmp/images/frontend.tar
+    
+    - name: Summary
+      run: |
+        echo "✅ Build completed"
+        echo "Images ready for deployment"