Add CI for testing arm64 docker (#2315)

* Add CI for testing build of docker-arm64

* Add specs check to dockerfiles

.github/workflows/ci.yml

@@ -91,3 +91,29 @@ jobs:
       - name: Test Docker
         run: while curl -Isf http://localhost:3000; do sleep 1; done
 
+  build-docker-arm64:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: arm64
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Build Docker ARM64 image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: docker/Dockerfile.arm64
+          platforms: linux/arm64/v8
+
+      - name: Test Docker
+        run: while curl -Isf http://localhost:3000; do sleep 1; done
+
+