spaceport/webclient/src/Misc.js

import React, { useState, useEffect } from 'react';
import { BrowserRouter as Router, Switch, Route, Link, useParams } from 'react-router-dom';
import './light.css';
import { Container, Divider, Dropdown, Form, Grid, Header, Icon, Image, Menu, Message, Segment, Table } from 'semantic-ui-react';

export function PleaseLogin() {
	return (
		<Container text>
			<Message warning>
				<Message.Header>You must login before you can do that!</Message.Header>
				<p>Visit our <Link to='/'>login page</Link>, then try again.</p>
			</Message>

			<img className='photo-404' src='/404.jpg' />
			<p style={{ textAlign: 'right' }}>
				<i>Space shuttle Endeavour, NASA (2011)</i>
			</p>
		</Container>
	);
};

export function NotFound() {
	return (
		<Container text>
			<Message warning>
				<Message.Header>The page you requested can't be found!</Message.Header>
				<p>Visit our <Link to='/'>home page</Link> if you are lost.</p>
			</Message>

			<img className='photo-404' src='/404.jpg' />
			<p style={{ textAlign: 'right' }}>
				<i>Space shuttle Endeavour, NASA (2011)</i>
			</p>
		</Container>
	);
};