Because I think `restic` will not deal with the compressed format of
`gitea`'s native `dump` command, I set up a manual backup.
This could lead to potentially corrupted data if I happen to backup at
the exact same time as a push to a repository. However given the
frequency of backups planned, I assume that most of them will be fine.
I want the ssh addresses to use 'git' as a user, so the service must be
set up with this user as well.
I also want the port to be configurable in case I need to change it.
Bruno BELANYI