You need to have nodejs >=12 installed and added to your PATH. Moreover you need to install all packages from package.json. Than you can run the application.
node app.js
The easyiest way to use this module is to use the ajax form submit functionallity implemented in index.html. You only need to customize you form-inputs and the POST URL. In your backend you can parse the request body for inputs and socketId.
Now you can use the socket-API:
URL: localhost:3001/makemessage
PARAMS:
uuid: The socketId,
msg: The message you want to send to the socket