Add links to repo and blog

app/assets/index.html

@@ -41,6 +41,11 @@
       clear (recent) browsing history.
     </p>
 		<div id="react-root"></div>
+    <p>
+      See [my post about this technique](https://frank.sauerburger.io/2019/01/30/tls-tracking.html)
+      and the [development repository for
+      this live demonstration](https://gitlab.sauerburger.com/frank/tls-tracking).
+    <p>
 	</main>
   <footer>
     <p>