pandas.from_dictjust for display.
jupyterhub/configurable-http-proxy- i'm not sure but I think the new image exposing multiple ports may have something to do with it. Before I believe only 8000 was exposed, now 8001 as well. Where should I direct traffic?
Spawner.default_urlattribute, but as far I can see, it doesn't do anything (except of cmd/args modification).