Caddy 2 is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go.
You can see the docs in https://caddyserver.com/
This is the status running on my server，just 4M used
root@sen:~# caddy start
Starting Caddy Web Server... [DONE]
Caddy Web Server is running
Caddy (PID: 2029) is using 4MB RAM
System available RAM 19MB
Uptime - 3 second
877-SENTRIS
