Add a motd to provide some guidance

[RickCogley]

It might be user-friendly to add a message in /etc/motd (message of the day) regarding some of the key points about sysadmin for lume cms on a vps. It's a typical file that, if exists, will get displayed when you log in. On my Hetzner vps, the file did not even exist, but if you just create it, it will work.

For example:

=== WELCOME - LUME CMS TIPS ===
Lume is git cloned to ~/www

Use systemctl to control the daemons:

systemctl status lumecms
systemctl stop lumecms
systemctl start lumecms
systemctl restart lumecms
systemctl status caddy
etc

Use journalctl to check logs:

journalctl -r -u lumecms
q to quit

Of course, there's an argument to be made for not overwriting any existing /etc/motd so, in that case maybe create it in /etc/motdlume and just give a message that it's there if people want to incorporate.

Just an idea.