adds GA

public/index.html

@@ -19,6 +19,21 @@
       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
     -->
     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!-- Global site tag (gtag.js) - Google Analytics -->
+    <script
+      async
+      src="https://www.googletagmanager.com/gtag/js?id=UA-25812343-2"
+    ></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag() {
+        dataLayer.push(arguments);
+      }
+      gtag("js", new Date());
+
+      gtag("config", "UA-25812343-2");
+    </script>
+
     <!--
       Notice the use of %PUBLIC_URL% in the tags above.
       It will be replaced with the URL of the `public` folder during the build.