chore(client): Move client app to /client

client/gatsby-browser.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Provider } from 'react-redux';
+
+import { createStore } from './src/redux/createStore';
+import AppMountNotifier from './src/components/AppMountNotifier';
+
+const store = createStore();
+
+export const wrapRootElement = ({ element }) => {
+  return (
+    <Provider store={store}>
+      <AppMountNotifier render={() => element} />
+    </Provider>
+  );
+};
+
+wrapRootElement.propTypes = {
+  element: PropTypes.any
+};