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

client/src/components/header/header.component.jsx

@@ -0,0 +1,36 @@
+import React, { Component } from "react";
+import { Link } from "react-router-dom";
+import { Menu, Icon } from "antd";
+import "./header.styles.scss";
+
+class Header extends Component {
+  handleClick = e => {
+    console.log("click ", e);
+    this.setState({
+      current: e.key
+    });
+  };
+
+  render() {
+    const { selectedNavItem, navItems } = this.props;
+    return (
+      <Menu
+        className="header"
+        onClick={this.handleClick}
+        selectedKeys={selectedNavItem}
+        mode="horizontal"
+      >
+        {navItems.map(navItem => (
+          <Menu.Item key={navItem.title}>
+            <Link to={navItem.path}>
+              <Icon type={navItem.icontype} />
+              {navItem.title}
+            </Link>
+          </Menu.Item>
+        ))}
+      </Menu>
+    );
+  }
+}
+
+export default Header;