Adding Google Analytics

src/pages/404/index.js

@@ -1 +1,4 @@
 import '../../style.css';
+import { setupGA } from '../../analytics';
+
+setupGA();

src/pages/index/index.js

@@ -5,5 +5,8 @@ import App from '../../components/App';
 
 import '../../style.css';
 import '../../service-worker';
+import { setupGA } from '../../analytics';
+
+setupGA();
 
 ReactDOM.render(<App/>, document.getElementById('root'));