Setting up a dev environment for jupyterlab extension inside jupyterhub

[arash afshar]

Hello,

I am developing a jupyterlab extension that uses hub functionalities. I am using https://github.com/jupyterhub/jupyterhub/blob/master/onbuild/Dockerfile to setup the lab and hub in a container locally.

When I change my extension and build it using `jlpm install` and `jupyter labextension install . --no-build`, I would be forced to rebuild the lab to see my changes which takes a long time.

What can I do to make my dev workflow faster? Is there a way to run jupyterlab in watch mode inside https://github.com/jupyterhub/jupyterhub/blob/master/onbuild/Dockerfile ?

Other docker-based solutions are welcomed as well, my end goal is to have a fast workflow to test jupyterlab extension inside the hub.

Thank you,

Arash