Update HPC instructions for Jupyterlab version 3

[rsignell-usgs]

Jupyterlab version 3 no longer needs to have extensions installed separately. Hurrah! Also the config file with the password is now in ~/.jupyter/jupyter_server_config.py instead of ~/.jupyter/jupyter_notebook_config.py.

[github-actions]

Thank you for your contributions!

A preview of your changes can be viewed at:

• https://raw.githack.com/pangeo-data/pangeo/rsignell-usgs-patch-1-preview/index.html

[rsignell-usgs]

@clyne would you be willing to review this?

[clyne]

@clyne would you be willing to review this?

Sorry, but I have zero experience with Jupyter Lab in HPC environments. Perhaps @andersy005 would be willing?

[rsignell-usgs]

@choldgraf , perhaps you could review, now that you guys are on the Pangeo project!

[choldgraf]

@rsignell-usgs I'd be happy to review but to be honest I don't think I am qualified haha. I still haven't used JupyterLab 3 and haven't been very involved in its development 😬 . Though I think that @GeorgianaElena has recently been working on getting JupyterLab 3 to work in the 2i2c hubs, so maybe she can share some things she's learned?

[GeorgianaElena]

Hi there 👋
The JupyterLab3 for the 2i2c hubs is still a work in progress actually (if you want to follow up with it, it's this one: 2i2c-org/infrastructure#204)

The most important thing that I learned when trying to switch to JupyterLab3 is making sure that all the previous extensions you were using are actually compatible with v3. This means that they should have the jupyterlab extension be installed automatically as part of the python package pip installation.

For example, I noticed jupyter-server-proxy being mentioned here. Making it fully compatible with JupyterLab3 is a work in progress right now jupyterhub/jupyter-server-proxy#233, but shouldn't be long before a new release with this change :D

Hope I've been of any help 🌻

[rsignell-usgs]

Thanks @andersy005 for the fixes, and thanks @choldgraf for passing the buck to @GeorgianaElena ! 😸

@GeorgianaElena , looks like with jupyterhub/jupyter-server-proxy#245 we are good to go with jupyter-server-proxy, right?

[rsignell-usgs]

The labextensions seem to be working fine, so merging