Find a secure workaround for jupyter auth key requirement

[andrewphilipsmith]

At present, when connecting to the jupyter notebook, user need to enter a shared authentication key. This authentication key changes each time the jupyter server is restarted. This is inconvenient for users and admins.

Find an alternative way to secure the jupyter server, and authenticate the users.

[griff-rees]

Thanks @andrewphilipsmith.

The scaffolding for a potential solution is in local.yml, following a workshop with @thobson88 and @lukehare.

[griff-rees]

The jupyterlab config in local.yml has had some further attention but remains commented out.