Show HN: Express-like web server in a single file for node / good for learning

In case you see this and are wondering why?

Basically Unit Tested and Demos pages needed a Web Server and originally I was using PHP. But of course I didn’t want to publish a npm/js project that needs PHP.

I could have simply used express but at the time was developing the project on multiple computers so having a zero dependency express-like web server allowed the project to remain small and very quick to copy.