ci: add image-push-master for arm64

Author: cyclinder

.github/workflows/image-push-master.yml

@@ -33,6 +33,33 @@ jobs:
           tags: ghcr.io/${{ github.repository }}:latest-amd64
           file: Dockerfile
 
+  push-arm64:
+    name: Image push/arm64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Container Registry
+        if: github.repository_owner == 'k8snetworkplumbingwg'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push container image
+        if: github.repository_owner == 'k8snetworkplumbingwg'
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ghcr.io/${{ github.repository }}:latest-arm64
+          file: Dockerfile.arm64
+
   push-origin:
     name: Image push/origin
     runs-on: ubuntu-latest