Create team account for Jupyter

[FedericoCeratto]

The htpasswd file for Nginx on monitoring.ooni.org has individual accounts but IIRC the identity is not really logged or used by jupyter.
Create a team account instead.

[hellais]

We might want to consider as part of this to switch to jupyterhub (https://jupyter.org/hub) which is the proper way of handling a multi-account jupyter instance.

This is what I have setup on ooni/data for giving third parties access to it and it works a bit better compared to vanilla jupyterlab.