Updated to GA4.

Removed GitHub ribbon.
Removed Gitter Sidercar references.

templates/footer.ftl

@@ -4,37 +4,22 @@
 
     </div> <!-- /container -->
 
-	<div class="github hidden-phone hidden-tablet">
-		<a href="https://github.com/jbake-org/jbake"><img style="position: fixed; top: 0; right: 0; border: 0; z-index: 1050;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
-	</div>
-
     <!-- Le javascript
     ================================================== -->
     <!-- Placed at the end of the document so the pages load faster -->
     <script src="/js/jquery-1.9.1.min.js"></script>
     <script src="/js/bootstrap.min.js"></script>
     <script src="/js/prettify.js"></script>
-
-    <script type="text/javascript">
 
-	  var _gaq = _gaq || [];
-	  _gaq.push(['_setAccount', 'UA-38992729-1']);
-	  _gaq.push(['_trackPageview']);
-	
-	  (function() {
-	    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
-	    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
-	    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
-	  })();
-	
-	</script>
-
-	<script>
-	  ((window.gitter = {}).chat = {}).options = {
-	    room: 'jbake-org/jbake'
-	  };
-	</script>
-	<script src="https://sidecar.gitter.im/dist/sidecar.v1.js" async defer></script>
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-4QEE72CSQZ"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+
+        gtag('config', 'G-4QEE72CSQZ');
+    </script>
 
   </body>
 </html>