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.

diagrams/onprem/registry.py

@@ -0,0 +1,15 @@
+# This module is automatically generated by autogen.sh. DO NOT EDIT.
+
+from . import _OnPrem
+
+
+class _Registry(_OnPrem):
+    _type = "registry"
+    _icon_dir = "resources/onprem/registry"
+
+
+class Harbor(_Registry):
+    _icon = "harbor.png"
+
+
+# Aliases