This is the fabric port, the Forge version is available here
This mod runs a simple HTTP server alongside the minecraft server. The mod allows You to host websites and share files and Server Backups directly from your server without the need of a seperate server setup. Adjust the port and design your website.
It also has a powerful API allowing you to fetch server info about players and the server itself. More info on the API's Wiki page
The http server has up to no performance impact on the server
If used wrongly this mod can be a security risk for your server and all devices connected to the network that your server is in.
Do only put files into your webservers root directory that you want to be accessible to the internet. Those files are public to the entire world.
Use at your own risk!
For Setup and further Info, please refer to the Wiki