https://github.com/gollum/gollum/wiki/Installation
Requires sudo Requires cmake
Follow "Debian 9.7 - gem" installation guide (60 MB download + some) Building first time takes a few minutes
$ mkdir my_wiki $ cd my_wiki $ git init --initial-branch=trunk
Run gollum by specifying path to the wiki and branch name
$ gollum --ref main my_wiki/
Open gui by executing
$firefox http://localhost:4567
screen -dmS gollum_web gollum --ref master expoweb screen -dmS gollum_loser gollum --ref master loser