Setup matamo on website for marketing

[starbelly]

Matamo is setup and working. I pulled this back to in progress because I'm awaiting a reply from matamo on non-profit discount information.

[starbelly]

Resolved via

• https://github.com/erlef/website/pull/227
• https://github.com/erlef/website/pull/226
• https://github.com/erlef/website/commit/db9a526eaaaca56386fe419684d0144d4899b580