This is a web application for ApisCP.
cd /usr/local/apnscp
mkdir -p config/custom/webapps
git clone https://github.com/LithiumHosting/apiscp-webapp-mediawiki config/custom/webapps/mediawiki
./composer dump-autoload -o
Edit config/custom/boot.php, create if not exists:
<?php
\a23r::registerModule('mediawiki', \LithiumHosting\WebApps\MediaWiki\MediaWiki_Module::class);
\Module\Support\Webapps::registerApplication('mediawiki', \LithiumHosting\WebApps\MediaWiki\Handler::class);
Then refresh the web apps
cpcmd webapp:refresh-apps
Voila!
All third-party documentation is available via docs.apiscp.com.