Set up prod instance of Mediawiki

[[sneakers the rat]] did amazing work with [[Nathan Schneider]] and others setting up https://wiki-dev.social.coop, now we should set up a production instance that runs on Coop-owned infrastructure.

Default: this could go into [[hypha]] -> hypha.social.coop?

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information