Added dir resources/onprem/registry, added Harbor Container Registry icon resources/onprem/registry/harbor.png from https://github.com/cncf/artwork/blob/master/projects/harbor/icon/color/harbor-icon-color.png. Ran convert resize command to resize original. Ran autogen.sh via Docker. Registry.py now exists in diagrams/onprem/ dir. docs/nodes/onprem.md auto-updated.

docs/nodes/onprem.md

@@ -212,6 +212,10 @@ Node classes list of onprem provider.
 - **diagrams.onprem.queue.Rabbitmq**, **RabbitMQ** (alias)
 - **diagrams.onprem.queue.Zeromq**, **ZeroMQ** (alias)
 
+## onprem.registry
+
+- **diagrams.onprem.registry.Harbor**
+
 ## onprem.search
 
 - **diagrams.onprem.search.Solr**