From the Github page, "I started this because I wanted to do C network programming"

I think this is a poor choice (from a security perspective). It should be written in Go or rust. C programs (exposed to the network) are dangerous even when written by experienced developers.

Really, in 2022, everything Internet facing should be written in a memory safe language, running as a normal user (no root) and have a strong MAC policy applied. Anything else is too risky.