If you use Mercurial (hg), you can update your documentation automatically each time you push to your web server (or if you pull from another server to your web server).
To do that, open your repository’s .hg/hgrc in your favorite editor and add the following lines to it:
[hooks]
changegroup = /path/to/your/python path/to/manage.py updatedoc -b <project>
Now, each time the repository is modified via a pull or push command, the documentation on your Django site will be updated automatically.