Added google analytics tracking code

src/Web/wwwroot/index.html

@@ -40,6 +40,16 @@
 
     <script src="js/lib.min.js"></script>
     <script src="js/app.min.js"></script>
+
+    <script>
+        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+        })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+
+        ga('create', 'UA-81915606-4', 'auto');
+        ga('send', 'pageview');
+    </script>
     <!-- @endif -->
     <!-- @exclude -->
     <script src="lib/jquery/jquery.js"></script>