index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Citasync</title>
    <script src="https://unpkg.com/react@18/umd/react.development.js" crossorigin></script>
    <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin></script>
    <script src="https://unpkg.com/react-router-dom@5/umd/react-router-dom.min.js" crossorigin></script>
  </head>
  <body>
    <div id="root"></div>
    <script type="text/babel">
      const { useState } = React;
      const { BrowserRouter, Route, Link, useNavigate } = ReactRouterDOM;
      
      function Home() {
        const navigate = useNavigate();

        const handleClick = () => {
          navigate('/menu');
        };

        return (
          <div className="app">
            <div className="home-form">
              <div align="center">
                <h1>Bienvenido a nuestra aplicación</h1>
              </div>
              <div className="button-container">
                <button
                  type="button"
                  className="button-clicked"
                  onClick={handleClick}
                >
                  Acceder a la app
                </button>
              </div>
            </div>
          </div>
        );
      }

      ReactDOM.render(
        <BrowserRouter>
          <Route exact path="/" component={Home} />
        </BrowserRouter>,
        document.getElementById('root')
      );
    </script>
  </body>
</html>