This commit implements three new services, specifically:
- The `container-volume` service, which applies to a specific volume
name and ensures this exists. This is mainly useful as a dependency
to other services, as Podman will create named volumes itself if
needed.
- The `container-volume-backup` service, which creates a `tar.gz`
snapshot of the given volume's contents in `/var/lib/backups`.
- The `container-volume-restore` service, which populates an empty
volume from a pre-existing file in `/var/lib/backups`, presumably
created by `container-volume-backup`.
These are then be used to automatically create volume snapshots every 12
hours, rolling over every 7 days.
System files are moved to `/etc/coreos-home-server` to be unambiguous
in relation to other, pre-installed system files. Long-running services
are also now defined as `Type=notify`, which helps improve ordering and
dependencies.
The fixes here include typos, removals of deprecated paths, fixes for
first-boot-only systemd targets and related MariaDB migrate machinery,
better logging for Postfix, and an increase in the default request body
size for the default NGINX ingress.
