All in windows...
Express https://www.npmjs.com/package/express
Nodejs https://nodejs.org/en/
Johnny five http://johnny-five.io/
StandardFirmata used in arduino...
Install express and johnny five in the same folder of server.js.
To execute the server paste in cmd "node server.js", in the same folder...
Youtube: https://youtu.be/4avAr_N7N7E