globo baz123
This combining step is actually already implemented if you setup the certificate with dietpi-letsencrypt. Check:
cat /etc/systemd/system/certbot.service.d/dietpi-lighttpd.conf
If your certificate does not renew automatically, so you e.g. need to run certbot renew manually, then I guess it is due to the old authentication module we used that can only run when Lighttpd service is disabled. To solve this (hence have certs renewed automatically), adjust the method:
certbot renew --force-renewal --webroot -w /var/www