Our previous setup did not ensure that the default server was actually
the default (though doing this for port 443 remains an open question).
In addition, we now have Nginx close the connection immediately rather
than respond with a 204.
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.
Naming for services has been consolidated to `nginx-proxy` and
`nginx-serve`, and issues with resolving underlying containers in the
case of restarts have been fixed by way of resolver configuration.
This contains the culmination of work done privately for a few months,
and is intended to be a solid basis for other peoples' experimentations
with setting up single-node, home-server setups using Fedora CoreOS.