add drum-machine-react

drum-machine-react/src/index.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import { Provider } from "react-redux";
+import store from "./store";
+
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(
+  <Provider store={store}>
+    <App />
+  </Provider>,
+  document.getElementById('root')
+);
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();