add drum-machine-react

drum-machine-react/src/App.js

@@ -0,0 +1,20 @@
+import React from 'react';
+
+import './App.css';
+import DrumMachine from "./DrumMachine";
+
+class App extends React.Component {
+  render() {
+    return (
+      <div className="App">
+        <a href="https://github.com/TrentSPalmer/fcc-challenges/tree/gh-pages/drum-machine-react" className="githubLabel" target="_blank" rel="noopener noreferrer">
+          <img src="https://github.blog/wp-content/uploads/2008/12/forkme_right_white_ffffff.png?resize=149%2C149"
+               className="attachment-full size-full" alt="Fork me on GitHub" data-recalc-dims="1"></img>
+        </a>
+        <DrumMachine />
+      </div>
+    );
+  }
+}
+
+export default App;