Fixed all firebase login issues. Added private routes. Reconfigured components and reorganized project.

client/src/pages/landing/landing.component.jsx

@@ -0,0 +1,15 @@
+import React from "react";
+import { Typography } from "antd";
+
+import HeaderContainer from "../../components/header/header.container";
+
+export default function LandingPage() {
+  return (
+    <div>
+      <HeaderContainer landingHeader />
+      <Typography.Title>
+        Welcome to bodyshop.app.
+      </Typography.Title>
+    </div>
+  );
+}