Merge pull request #404 from maxamillion/fix_registry_docs

add link to persistent storage config docs for docker-registry

README_origin.md

@@ -99,10 +99,13 @@ oadm router --create=true \
 On the master host:
 ```sh
 oadm registry --create=true \
-  --credentials=/etc/openshift/master/openshift-registry.kubeconfig \
-  --mount-host=/var/lib/openshift/docker-registry
+  --credentials=/etc/openshift/master/openshift-registry.kubeconfig
 ```
 
+If you would like persistent storage, refer to the
+[OpenShift documentation](https://docs.openshift.org/latest/admin_guide/install/docker_registry.html)
+for more information on deployment options for the built in docker-registry.
+
 ## Overriding detected ip addresses and hostnames
 Some deployments will require that the user override the detected hostnames
 and ip addresses for the hosts. To see what the default values will be you can