Initial commit

Cleanup cronjob was copied from the Debian project (without farm support):
- https://salsa.debian.org/debian/dokuwiki/-/blob/78df80937bbc06146514e6d9483731dc3d9756e3/debian/dokuwiki.cron.daily
- https://salsa.debian.org/debian/dokuwiki/-/blob/78df80937bbc06146514e6d9483731dc3d9756e3/debian/dokuwiki.default