Configuration of Piwik analytics in gitlab

Hello,

I'm currently attempting to get piwik to track my gitlab installation, however I cannot get it working.

There doesn't appear to be much in the way of documentation for Piwik with gitLab :(

## Piwik analytics.
    piwik_url: 'mypiwikinstall.com'
    piwik_site_id: '1'