add debugging for systemd

README.md

@@ -119,3 +119,10 @@ and [LaunchControl](http://www.soma-zone.com/LaunchControl/)
 ([direct download](http://www.soma-zone.com/download/files/LaunchControl_1.30.1.tar.bz2))
 makes it actually quite easy.
 (ignore that the site looks like a 90s spam site - much like MakeMKV - it's actually legit)
+
+Debugging systemd
+-----------------
+
+```bash
+sudo -u www-data CADDYPATH=/etc/ssl/caddy /usr/local/bin/caddy -log stdout -agree=true -conf=/etc/caddy/Caddyfile -root=/var/tmp
+```