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

client/src/components/loading-spinner/loading-spinner.component.jsx

@@ -0,0 +1,7 @@
+import React from "react";
+import { Spin } from "antd";
+import "./loading-spinner.styles.scss";
+
+export default function LoadingSpinner() {
+  return <Spin className="spinner" size="large" delay="500" />;
+}