I like to do an other proposal:
Start writing first chapter, getting started, of the documentation on github.
The simple fact there is an outdated “How to install Nethserver 7 on a RaspberryPI2/3” wiki page a kind of proves wiki’s don’t work 
… Oke biased, I think wiki’s don’t work (and this is a mild description of my opinion…)
Most of all i’d like to prevent keeping several different information sources up to date.
also see and comment on : ARM development: next steps : “Documentation”