mention how to proxy dashbord link in README

It took a lot of digging to find out how to connect to a dashboard on a remote machine/ jupyterhub instance. Finally I found: https://jobqueue.dask.org/en/latest/interactive.html#configuration and it works well. Could we link to this in the README?

That is the recommended way to connect to a dashboard via jupyterhub? How would a sysadmin best set that up for all users?

DASK_DISTRIBUTED__DASHBOARD__LINK="/user/{JUPYTERHUB_USER}/proxy/{port}/status"

before starting jupyterhub?

[tlvu]

DASK_DISTRIBUTED__DASHBOARD__LINK="{JUPYTERHUB_SERVICE_PREFIX}proxy/{port}/status"

Is even better since it will take care of everything in front of /user, if any.

Example on my system:

                "JUPYTERHUB_USER=lvu",           
                "JUPYTERHUB_BASE_URL=/jupyter/",
                "JUPYTERHUB_SERVICE_PREFIX=/jupyter/user/lvu/",

[mathause]

I think I had issues with this because I had an old config file around - now it seems to work without setting the environment variable.