Enable arm64 and armv7 image builds

Signed-off-by: Vidhem <vidhem.chhabra@gmail.com>

.github/workflows/build-push-docker.yml

@@ -27,6 +27,12 @@ jobs:
       - name: Checkout repository
         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: Log in to the Container registry
         uses: docker/login-action@v1
         with:
@@ -45,5 +51,6 @@ jobs:
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}