Akaunting provides an [install](332f2cc1d8/app/Console/Commands/Install.php) artisan script that does non-interactive installation from environment variables.

This PR converts from manual setup to automated first-time setup of the first company using this script, and converts the podman scripts to use `pod`s, consolidating configuration between `docker` and `podman` to settle on always using `127.0.0.1` for the DB host. `localhost` attempts a socket connection instead of trying to resolve the hostname, and I don't think we need to mess with mounting the socket into both containers.

Documentation for initial setup has been streamlined, and the variables are more clearly documented supporting this less interactive installation/setup.
Co-Authored-By: James Harmison <jharmison@noreply.git.jharmison.com>
Co-Committed-By: James Harmison <jharmison@noreply.git.jharmison.com>