public: add analytics

public/index.html

@@ -12,6 +12,21 @@
     />
     <meta name="author" content="Tobias Fried" />
 
+    <!-- GOOGLE ANALYTICS -->
+    <script
+      async
+      src="https://www.googletagmanager.com/gtag/js?id=UA-179205759-1"
+    ></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag() {
+        dataLayer.push(arguments);
+      }
+      gtag("js", new Date());
+
+      gtag("config", "UA-179205759-1");
+    </script>
+
     <!-- GOOGLE META -->
     <meta itemprop="name" content="Phosphor Icons" />
     <meta