Create hello world React app with hot module replacement

src/index.js

@@ -0,0 +1,22 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import 'react-hot-loader/patch';
+import { AppContainer } from 'react-hot-loader';
+
+import App from './app';
+
+
+const render = Component => {
+	ReactDOM.render(
+		<AppContainer>
+			<Component />
+		</AppContainer>,
+		document.getElementById('root')
+	)
+}
+
+render(App)
+
+if (module.hot) {
+	module.hot.accept('./app', () => { render(App) })
+}