chore(client): Move client app to /client

client/src/pages/certification.js

@@ -0,0 +1,11 @@
+import React, { Component } from 'react';
+
+import './certification.css';
+
+class Certification extends Component {
+  render() {
+    return <h2>Certs</h2>;
+  }
+}
+
+export default Certification;