feat: add tracking

templates/error.html

@@ -5,6 +5,16 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Nothing to see here</title>
     <script src="https://cdn.tailwindcss.com"></script>
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-WH82TZ9BQ6"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+
+        gtag('config', 'G-WH82TZ9BQ6');
+    </script>
+
     <link rel="icon" type="image/x-icon" href="/static/favicon.ico">
     <style>
         * {