Added matomo tracking

plugins/matomo-plugin/index.ts

@@ -0,0 +1,35 @@
+import type { Plugin } from '@docusaurus/types';
+
+export default function matomoHeadPlugin(): Plugin {
+    const isProd = process.env.NODE_ENV === 'production';
+
+    return {
+        name: 'matomo-plugin',
+        injectHtmlTags() {
+            if (!isProd) {
+                return {};
+            }
+            return {
+                headTags: [
+                    {
+                        tagName: 'script',
+                        attributes: {
+                            id: 'matomo-tracking',
+                            strategy: 'afterInteractive',
+                        },
+                        innerHTML: `var _paq = window._paq = window._paq || [];
+_paq.push(['trackPageView']);
+_paq.push(['enableLinkTracking']);
+(function() {
+var u="https://psedev.matomo.cloud/";
+_paq.push(['setTrackerUrl', u+'matomo.php']);
+_paq.push(['setSiteId', '16']);
+var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+g.async=true; g.src='//cdn.matomo.cloud/psedev.matomo.cloud/matomo.js'; s.parentNode.insertBefore(g,s);
+})();`,
+                    },
+                ],
+            };
+        },
+    };
+}