The idea is to make the AXIOM documentation available both through a user-facing page (like [[ https://wiki.apertus.org | the current wiki ]]) and in the form of a repository on the [[ https://github.com/apertus-open-source-cinema/ | apertus GitHub organization]].
Content could then be added and edited both by users familiar/comfortable with working with wikis (including "drive-by" users) and more tech-savvy users who prefer working on content locally/offline via version control.
It would also mean that all documentation could be downloaded at once (downloading a GitHub repository in the form of a zip file does not require a GH account) and is available in the same place where all code is being made available. However, the wiki functionality/frontend should be kept so anyone can continue to contribute to the documentation.
There are already some wiki-git solutions, e.g. [[ http://gitit.net/ | gitit ]] or [[ https://github.com/gollum/gollum | gollum ]], which would need to be looked into & compared.