public/index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React Tutorial</title>
    <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://unpkg.com/react@15.3.0/dist/react.js"></script>
    <script src="https://unpkg.com/react-dom@15.3.0/dist/react-dom.js"></script>
    <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
    <script src="https://unpkg.com/jquery@3.1.0/dist/jquery.min.js"></script>
    <script src="https://unpkg.com/remarkable@1.7.1/dist/remarkable.min.js"></script>
  </head>
  <body>
    <div id="content"></div>
    <script type="text/babel" src="scripts/example.js"></script>
    <script type="text/babel">
      // To get started with this tutorial running your own code, simply remove
      // the script tag loading scripts/example.js and start writing code here.
    </script>
  </body>
</html>