Caddy, the modular and easy to configure webserver. Seems to be a drop in replacement for nginx and just as fast, maybe even faster. Open source and automatic support for TLS certificates: https://caddyserver.com/
What's the catch? has anyone tried it, is it better than nginx or apache?
Never heard of it until recently, it does look promising tho.
Yea, it support configurations from most older web servers, nginx, apache you name it. Tho easiest is to use it's own api and configuration. It's also written in go, therefore platform independent and scales excellent over a cluster of multiple servers.
I've only heard good things about it, but haven't tried it out yet. Still on my old bloated apache2 setup and won't touch anything for now, as the smallest change could break everything :/