As root on a fresh Debian server: `apt-get install nodejs` `apt-get install npm`
`npm install -g wiki` to install the NPM package 
(GitHub readme )
Configure Wiki writing the config file to `/etc/wiki-config.json` to be compatible with a future step.
Run the wiki command.
`wiki`
Now the presence of any directory matching the requested domain name tells Wiki to serve a wiki for that domain name.
Now set the system up to run wiki on startup. Wiki Init Scripts on Debian
Once you have a site started, Claim a Site.
Each site has a gradient flag that distinguishes it from other sites. A new one can be picked using the Flagmatic plugin About Flagmatic Plugin.