index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Awesome Project</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Terminal
$ npm start
> my-app@1.0.0 start
> react-scripts start
Compiling successfully...
You can now view my-app in the browser.
Local: http://localhost:3000
On Your Network: http://192.168.1.100:3000
$ _