Source Code of the Server:

https://www.w3.org/Daemon/

https://www.w3.org/Daemon/Implementation/

Sir Berners-Lee tells the story himself in this great memoir: https://www.panmacmillan.com/authors/tim-berners-lee/this-is...

Lots of detail and inside stories about the work it took to keep the web open and free.

Fun fact, in my student group at university of twente two people claimed to have developed the first web server for Windows. They called it W4Server and at fist thought of erecting a company called Antelope Software, but later prioritised their studies and let it drop. Another fun fact is that on a web search the first result is a CVE relating to their work. But it was quite exciting at the time, all this brand new web that was emerging.

https://www.exploit-db.com/exploits/19622

The page talks about what I'd consider the first web _site_, but is missing info on the first web _server_, which was preserved and is displayed at a CERN museum.

Wikimedia link to an image: https://commons.wikimedia.org/wiki/File:First_Web_Server.jpg