Add Matomo tracking script (#109)

index.html

@@ -20,4 +20,18 @@
     <div id="root"></div>
     <script src="/src/main.jsx" type="module"></script>
   </body>
+  <script type="text/javascript">
+    var _paq = window._paq = window._paq || [];
+    /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
+    _paq.push(["disableCookies"]);
+    _paq.push(['trackPageView']);
+    _paq.push(['enableLinkTracking']);
+    (function () {
+      var u = "https://nethermind.matomo.cloud/";
+      _paq.push(['setTrackerUrl', u + 'matomo.php']);
+      _paq.push(['setSiteId', '4']);
+      var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0];
+      g.async = true; g.src = '//cdn.matomo.cloud/nethermind.matomo.cloud/matomo.js'; s.parentNode.insertBefore(g, s);
+    })();
+  </script>
 </html>