public/index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Hello React</title>
    <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.0/react.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.0/JSXTransformer.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js"></script>
  </head>
  <body>
    <div id="content"></div>
    <script type="text/jsx;harmony=true" src="scripts/example.js"></script>
    <script type="text/jsx;harmony=true">
      // 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>