Is your feature request related to a problem? Please describe.
Documentation is out of date, and should be updated.
Moreover, nbdev seems to be broken to generate the documentation.

Describe the solution you'd like
2 solutions seem appropriate:

• Repair and improve usage of nbdev
• Use nbsphinx to generate documentation (see doc here)

Describe alternatives you've considered
Optionally, we could have a custom workflow... but why re-inventing the wheel?