Consolidation of old infra overview into this page, mass update of formatting and content for clarity, reorganization.

Fix typo

See merge request !2

Backups are handled elsewhere now

Script ran fine on the console, failed in cron job.  This is because
the docker-compose exec command was attempting (by default) to allocate
 a TTY, and failing.  This was also not being detected because the
default bash behaviour is to return the status of the last command
in a pipe (in this case, gzip). Enable pipefail option to prevent this.

And on runko.social.coop.  Used as a stopgap backup solution there.

A stopgap until we get a proper backup

Copied from the cryptpad version.