Add more useful notes to chart

These are shown after every helm install

jupyterhub/templates/NOTES.txt

@@ -1,8 +1,19 @@
-Thank you for installing {{.Chart.Name}}. Your release is named {{ .Release.Name }}.
+Thank you for installing JupyterHub!
 
-This chart is UC Berkeley data8's version of jupyterhub.
+Your release is named {{.Release.Name}} and installed into the namespace {{.Release.Namespace}}.
 
-To learn more about the release, try:
+You can find if the hub and proxy is ready by doing:
 
-  $ helm status {{ .Release.Name }}
-  $ helm get {{ .Release.Name }}
+ kubectl --namespace={{.Release.Namespace}} get pod
+
+and watching for both those pods to be in status 'Ready'.
+
+You can find the public IP of the JupyterHub by doing:
+
+ kubectl --namespace={{.Release.Namespace}} get svc proxy-public
+
+It might take a few minutes for it to appear!
+
+Note that this is still an alpha release! If you have questions, feel free to
+  1. Come chat with us at https://gitter.im/jupyterhub/jupyterhub
+  2. File issues at https://github.com/jupyterhub/helm-chart/issues