Documentation not updated

[nicola883]

Hi.
It seems that the documentation to configure the application is not updated.
Is it in a place that is not linked from here?
I need, for example, to create a new theme and localize the app.
I have found this documentation:
https://biostar-central.readthedocs.io/en/latest/
but it seems that it refers to the biostar2016branch that has no commits for a long time.
Similarly, the wiki section on GitHub seems to report suggestions for an old version.
Thank you.

Originally posted by @nicola883 in #892