chore(learn): Merge learn in to the client app

client/gatsby-ssr.js

@@ -2,6 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { Provider } from 'react-redux';
 
+import headComponents from './src/head';
 import { createStore } from './src/redux/createStore';
 
 const store = createStore();
@@ -13,3 +14,31 @@ export const wrapRootElement = ({ element }) => {
 wrapRootElement.propTypes = {
   element: PropTypes.any
 };
+
+export const onRenderBody = ({ setHeadComponents, setPostBodyComponents }) => {
+  setHeadComponents([...headComponents]);
+  setPostBodyComponents([
+    <script
+      async={true}
+      key='chai-CDN'
+      src='https://cdnjs.cloudflare.com/ajax/libs/chai/4.1.2/chai.min.js'
+    />,
+    <script
+      async={true}
+      key='gtag-script'
+      src='https://www.googletagmanager.com/gtag/js?id=AW-795617839'
+    />,
+    <script
+      dangerouslySetInnerHTML={{
+        __html: `
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+          gtag('config', 'AW-795617839');
+        `
+      }}
+      key='gtag-dataLayer'
+    />,
+    <script async={true} id='stripe-js' src='https://js.stripe.com/v3/' />
+  ]);
+};