Adding Google Analytics

src/analytics.js

@@ -0,0 +1,10 @@
+import ReactGA from 'react-ga';
+
+const setupGA = () => {
+  ReactGA.initialize(process.env.GA_PROPERTY, {
+    debug: (process.env.NODE_ENV !== 'production')
+  });
+  ReactGA.pageview(document.location.pathname);
+};
+
+export { setupGA };

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'));