feat: update nginx conf for matomo

nginx/dev.conf

@@ -2,11 +2,25 @@ server {
   listen 8080 default_server;
 
   root /usr/share/nginx/html/;
+  set $matomo_script
+  "<script type='text/javascript'>
+    var _paq = window._paq = window._paq || [];
+    _paq.push(['trackPageView']);
+    _paq.push(['enableLinkTracking']);
+    (function() {
+      var u='<URL_GDLYON>';
+      _paq.push(['setTrackerUrl', u+'piwik.php']);
+      _paq.push(['setSiteId', '<SITE_ID>']);
+      var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+      g.type='text/javascript'; g.async=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
+    })();
+  </script>";
 
   location / {
     # First attempt to serve request as file, then
     # as directory, then fall back to displaying a 404.
     try_files $uri $uri/ /index.html;
+    sub_filter '</head>' '$matomo_script</head>';
   }
 
     location /api {