Add fathom script

And fix output dir for elm compile

website/site/templates/overview.html

@@ -56,4 +56,19 @@
 
         {% include "footer.html" %}
     </body>
+    <!-- Fathom - simple website analytics - https://github.com/usefathom/fathom -->
+    <script>
+     (function(f, a, t, h, o, m){
+         a[h]=a[h]||function(){
+             (a[h].q=a[h].q||[]).push(arguments)
+         };
+         o=f.createElement('script'),
+         m=f.getElementsByTagName('script')[0];
+         o.async=1; o.src=t; o.id='fathom-script';
+         m.parentNode.insertBefore(o,m)
+     })(document, window, '//webstats.daheim.site/tracker.js', 'fathom');
+     fathom('set', 'siteId', 'OGJDF');
+     fathom('trackPageview');
+    </script>
+    <!-- / Fathom -->
 </html>