How to make a contact form in creacte-react-app?

Question

Node.js

I made a form according to this guide https://blog.mailtrap.io/react-contact-form/#How_d... , at the end it says that you need the created index.js file (it is in the components folder, because create- react-app creates index.js initially) run through node index, but since I already have a react project and I start the server with nmp start, I can't run this command.
Thanks in advance.
Here is the structure

Answer 1

index.js (located in the components folder since create-react-app creates index.js initially)

this is not the same index.js, you should have created a separate project
. The tutorial says:

var express = require('express');
var router = express.Router();
var nodemailer = require('nodemailer');
и тд...