ci(docker.yml): add docker buildx

.github/workflows/docker.yml

@@ -16,6 +16,16 @@ jobs:
         run: echo "IMAGE_TAG=$(echo $GITHUB_REF_NAME)" >> $GITHUB_ENV
       - name: Checkout code
         uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Inspect builder
+        run: |
+          echo "Name:      ${{ steps.buildx.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
       - name: Login to GitHub Container registry
         uses: docker/login-action@v2
         with: