ci(docker): setup qemu

.github/workflows/docker.yml

@@ -19,11 +19,17 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
+
       - name: Set up dynamic build ARGs
         id: getargs
         run: echo "::set-output name=version::$(cat ./stable/VERSION)"
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v3
@@ -41,12 +47,14 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
             type=sha
+
       - name: Login to DockerHub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Build and push
         uses: docker/build-push-action@v2
         with: