[Improve] Add matomo integration for website analytics (#336)

diff --git a/docusaurus.config.js b/docusaurus.config.js
index d5ebe2c..8586eea 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -28,6 +28,30 @@
       },
     },
   },
+  headTags: [
+    {
+      tagName: 'script',
+      attributes: {
+        type: 'text/javascript',
+      },
+      <!-- Matomo -->
+      innerHTML: `
+          var _paq = window._paq = window._paq || [];
+          /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
+          _paq.push(["setDoNotTrack", true]);
+          _paq.push(["disableCookies"]);
+          _paq.push(['trackPageView']);
+          _paq.push(['enableLinkTracking']);
+          (function() {
+            var u="https://analytics.apache.org/";
+            _paq.push(['setTrackerUrl', u+'matomo.php']);
+            _paq.push(['setSiteId', '65']);
+            var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+            g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
+          })();
+        `,
+    },
+  ],
   presets: [
     [
       "classic",
@@ -197,7 +221,6 @@
     },
 
     footer: {
-      style: "light",
       links: [
         {
           title: "SeaTunnel",