Update container action

.github/workflows/docker.yml

@@ -15,6 +15,8 @@ jobs:
         uses: actions/checkout@v2
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v1
+      - name: Setup QEMU for Docker Buildx
+        uses: docker/setup-qemu-action@v2
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v1
         with:
@@ -29,15 +31,18 @@ jobs:
       - name: Get tag to build
         id: tag
         run: |
+          echo "latest=ghcr.io/sagernet/sing-box:latest" >> $GITHUB_OUTPUT
           if [[ -z "${{ github.event.inputs.tag }}" ]]; then
-            echo ::set-output name=tag::ghcr.io/sagernet/sing-box:${{ github.ref_name }}
+            echo "versioned=ghcr.io/sagernet/sing-box:${{ github.ref_name }}" >> $GITHUB_OUTPUT
           else
-            echo ::set-output name=tag::ghcr.io/sagernet/sing-box:${{ github.event.inputs.tag }}
+            echo "versioned=ghcr.io/sagernet/sing-box:${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
           fi
       - name: Build and release Docker images
         uses: docker/build-push-action@v2
         with:
           platforms: linux/386,linux/amd64,linux/arm64,linux/s390x
           target: dist
-          tags: ${{ steps.tag.outputs.tag }}
+          tags: |
+            ${{ steps.tag.outputs.latest }}
+            ${{ steps.tag.outputs.versioned }}
           push: true