Use qemu / buildx for aarch64 builds

.github/workflows/build.yml

@@ -14,6 +14,11 @@ jobs:
         with:
           fetch-depth: '0'
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: arm64
+
       - name: Generate CRI metadata
         id: meta
         uses: docker/metadata-action@v4
@@ -29,17 +34,20 @@ jobs:
           tags: |
             latest
 
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Login to GHCI
         uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-
       - name: Build and push
         uses: docker/build-push-action@v4
         with:
+          builder: ${{ steps.buildx.outputs.name }}
           context: .
           file: ./Dockerfile
           platforms: linux/amd64,linux/arm64