This example displays the text “Hello React!” in large, centered type on a blank page. It demonstrates a minimal React setup where the `App` component returns a styled `<div>` and is rendered into the DOM via `ReactDOM.render`. The code imports `React` and `ReactDOM`, and uses a production build of React 16.13.1 loaded from unpkg along with a separate `bundle.js`. No data or visualization libraries are used; the focus is purely on the basic React rendering workflow.