• It requires the basic React modules and also our next file to create the app.js file where we will put the code for our React app.
• We require ‘ babel-core ‘ module so we can compile React code (note the presets parameter : ‘ react ‘).
• Alternatively you can use ‘ npm run build ‘ as we have this line of code in the package.json file
• Making 2 different files will also help while rendering the file on the server site as we will work directly with the app.js file
• // REACT (for SEO) var React = require(‘react’); var ReactDOMServer = require(‘react-dom/server’);

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