ci: support multi-arch build and publish (#656)

.github/workflows/publish.yaml

@@ -32,7 +32,7 @@ jobs:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-    
+
       - name: Install dependencies
         run: npm ci
 
@@ -42,6 +42,12 @@ jobs:
       - name: Build project
         run: npm run build
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v4
@@ -50,10 +56,11 @@ jobs:
           tags: |
             type=semver,pattern={{version}}
 
-      - name: Build and push Docker image
+      - name: Build and push multi-arch Docker image
         uses: docker/build-push-action@v6
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}