adding google analytics support

Author: jkyberneees

docs/index.html

@@ -30,7 +30,17 @@
   <script src="//cdn.jsdelivr.net/npm/docsify@4"></script>
 
   <script src="https://unpkg.com/docsify-copy-code@2"></script>
-  <script src="https://unpkg.com/docsify-share/build/index.min.js"></script>
+  <script src="https://unpkg.com/docsify-share/build/index.min.js"></script>.
+
+  <!-- Global site tag (gtag.js) - Google Analytics -->
+  <script async src="https://www.googletagmanager.com/gtag/js?id=G-DHFKFCQFT3"></script>
+  <script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag() { dataLayer.push(arguments); }
+    gtag('js', new Date());
+
+    gtag('config', 'G-DHFKFCQFT3');
+  </script>
 </body>
 
 </html>