text: import React from 'react';
  import { Link } from 'react-router-dom';
  import configs from '../configs';
  
  const Header = () => (
    <div>
      <img src="../assets/react.svg" height="50" alt="react" />
      <h1>{configs.name}</h1>
      <ul>
        <li>
          <Link to="/">Home</Link>
        </li>
        <li>
          <Link to="/login">Login</Link>
        </li>
        <li>
          <Link to="/topics">Topics</Link>
        </li>
      </ul>
    </div>
  );
  
  export default Header;
  