feat: support building multi-platform images

Author: go-bai

.github/workflows/docker-image.yml renamed to .github/workflows/build-docker-image.yml

@@ -9,13 +9,13 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
-    
-    strategy:
-      matrix:
-        goos: [linux]
-        goarch: [amd64, arm64]
     steps:
-    - uses: actions/checkout@v3
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v2
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
     - name: Docker Login
       env:
         DOCKER_USER: ${{ secrets.DOCKER_USER }}
@@ -27,6 +27,11 @@ jobs:
       run: |
         docker login -u $DOCKER_USER -p $DOCKER_PASSWORD
     - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag ${{ secrets.DOCKER_USER }}/http-proxy:$GITHUB_REF_NAME
+      run: docker buildx build \
+        --platform=linux/arm64,linux/amd64 \
+        --tag ${{ secrets.DOCKER_USER }}/http-proxy:$GITHUB_REF_NAME \
+        --file Dockerfile \
+        --push .
+        
     - name: Docker Push
       run: docker push ${{ secrets.DOCKER_USER }}/http-proxy:$GITHUB_REF_NAME