I recently started to switch from nginx to caddy (not looking for a discussion on this point ;).
The problem that arose now, is that Zammad depends on
nginx | apache, not on
httpd. This way every time there’s a new http reverse_proxy you’d have to add it to the list; however the good news is, there is an agnostic alternative. nginx, apache2 and lighttpd all “provide”
httpd so that that would be the only required dependency.