WIP: add basic stuff

public/app.js

@@ -0,0 +1,16 @@
+'use strict';
+
+function onSignIn(googleUser) {
+	var profile = googleUser.getBasicProfile();
+	console.log('ID: ' + profile.getId()); // Do not send to your backend! Use an ID token instead.
+	console.log('Name: ' + profile.getName());
+	console.log('Image URL: ' + profile.getImageUrl());
+	console.log('Email: ' + profile.getEmail()); // This is null if the 'email' scope is not present.
+}
+
+  function signOut() {
+    var auth2 = gapi.auth2.getAuthInstance();
+    auth2.signOut().then(function () {
+      console.log('User signed out.');
+    });
+  }

public/index.html

@@ -105,3 +105,8 @@ You shouldn't use it for automated testing, because it will change, but it looks
   }
 
 </code></pre>
+
+<script src="https://apis.google.com/js/platform.js" async defer></script>
+<div class="g-signin2" data-onsuccess="onSignIn"></div>
+<a href="#" onclick="signOut();">Sign out</a>
+<script src="app.js"></script>