Creating a basic example of SSR

We will now create a very simple server-side application to look at the steps that are needed to build a basic universal setup. It is going to be a minimal and simple setup on purpose because the goal here is to show how SSR works rather than providing a comprehensive solution or a boilerplate, even though you could use the example application as a starting point for a real-world application.

The application will consist of two parts:

• On the server side, where we will use Express to create a basic web server and serve an HTML page with the server-side rendered React application
• On the client side, where we will render the application, as usual, using...