anchor.diff:  <p class="note"><b>Note</b>: For information about specifying <code>MY-REGISTRY-URL</code>, see <a href="https://cloud.google.com/container-registry/docs/pushing-and-pulling">Pushing and Pulling Images</a> on the Google Cloud documentation.</p>
   
   ##<a id='volume'></a> Docker Volume Support
  -You can use volume services with Docker apps. For more information about enabling volume support, see the [Using an External File System (Volume Services)](../services/using-vol-services.html) topic.+You can use volume services with Docker apps. For more information about enabling volume support, see the [Using an External File System (Volume Services)](../services/using-vol-services.html) topic.
  
positive.code: * `PORT`: The port where the registry serves traffic
  * `REPO`: The name of the repository where the image is stored
  * `IMAGE`: The name of the image being pushed
  * `TAG`: (Optional) The tag or version for the image
  
  For example, the following command pushes the `v2` version of the `my-image` image from the `my-repo` repository of the `internal-registry.example.com` registry on port `5000`:
  
  
negative.code:       - For Docker Hub, this is just the repository name
        - For a private registry, this includes the registry address and port, as described in [Push a Docker Image from a Private Registry](#private), in the format: `MY-PRIVATE-REGISTRY.DOMAIN:PORT/REPO`
    - `IMAGE`: The name of the image being pushed
    - `TAG`: (Optional, recommended) The tag or version for the image
    - `USER`: The username to use for authentication with the registry
  
  ##<a id='gcr'></a>Push a Docker Image From Google Container Registry (GCR)
  