feat(#189): add matomo tag

public/index.html

@@ -54,6 +54,14 @@
         id="ze-snippet"
         src="https://static.zdassets.com/ekr/snippet.js?key=2f84e9fe-830c-42bf-afa4-32c90d7c5f7b"
     ></script>
+    <!-- Matomo Tag Manager -->
+    <script>
+      var _mtm = window._mtm = window._mtm || [];
+      _mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
+      var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+      g.async=true; g.src='https://matomo.instat.tv/js/container_g9SlNJe0.js'; s.parentNode.insertBefore(g,s);
+    </script>
+    <!-- End Matomo Tag Manager -->
     <% } %>
     <!-- End of tv-instat Zendesk Widget script -->
     <!-- Start of ChromeCast script -->