Why is the Node.JS error popping up?

Question

JavaScript

I found someone else's project on github, I decided to figure it out in order to create a serv.part for my game following the example of this one.
Running it through the console, an error comes out:

As I understand it, some 'ecstatic' module is missing.
I also noticed that there are no semicolons in the JS code either in the client or server side.

I really need to launch it in order to make my own game following its example.

Answer 1

$ npm installdo first))