Any sort of static analysis to argue this doesn't have undefined behaviour bugs? It's cool, I just don't know a lot of cases where I would want/need an HTTP server and wouldn't want something more weathered
No, but by virtue of being a single header library it will run through whatever static analysis you have set up on your project. If an http server like NGINX solves your problem then, please, use that, because this is not an http server. It's a library for creating http servers.
I would also love if someone wanted to contribute fuzz testing or other static analysis to the project. PRs are welcome.