feat: update docker-ci workflow - arm64 support

.github/workflows/docker-ci.yaml

@@ -19,8 +19,14 @@ jobs:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
 
-      - name: Build the Docker image
-        run: docker build . --file Dockerfile --tag programzmh/chatnio:latest
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
 
-      - name: Push to DockerHub
-        run: docker push programzmh/chatnio:latest
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: programzmh/chatnio:latest

Dockerfile

@@ -9,7 +9,7 @@ COPY . .
 
 # Set go proxy to https://goproxy.cn (open for vps in China Mainland)
 # RUN go env -w GOPROXY=https://goproxy.cn,direct
-ENV GOOS=linux GOARCH=amd64 GO111MODULE=on CGO_ENABLED=1
+ENV GOOS=linux GO111MODULE=on CGO_ENABLED=1
 
 # Install dependencies for cgo
 RUN apk add --no-cache gcc musl-dev