Referencing this tutorial https://mdbootstrap.com/docs/angular/forms/contact/

This tutorial works fine on localhost. I'm new to production i've already deployed my website online but i can't seem to figure out how to get the server.js to work.

I was wondering (if it isn't too much work) if someone could show what to change in order for the tutorial to work on production, because noobies like myself get easily lost in the sea of answers.