Node module not starting?

Question

Node.js

Hello!!! I'm new to node, can you tell me why this happens?
I do everything according to this article I install the
module

I create app.js and index.html files, when I try to run it, it gives an error that it cannot find the module

Tell me why this is happening?

Answer 1

npm i express

Answer 2

you need to read the documentation or something else on nodejs, otherwise there will be no +1 to karma! Good luck