update root README

README.md

@@ -9,6 +9,7 @@ Part of the following is a mix between:
 - https://jupyterhub-dockerspawner.readthedocs.io/en/latest/docker-image.html
 - https://github.com/defeo/jupyterhub-docker/issues/18
 - https://jupyterhub.readthedocs.io/en/stable/troubleshooting.html
+- https://github.com/jupyterhub/jupyterhub-deploy-docker
 
 As suggested by [playermanny2](https://github.com/jupyterhub/dockerspawner/issues/295#issuecomment-481783620)
 we'll start with a simple use case launching jupyter/minimal-notebook to make sure all is working. Then we'll try with