title: Generate single physical javascript file using create-react-app
body: <p>This is perhaps a newbie question.
  I have created a small reactjs app using create-react-app and I see that the bundle.js file is being served from <a href="http://localhost:3000/static/js/bundle.js" rel="noreferrer">http://localhost:3000/static/js/bundle.js</a>. However, I do not see a physical "bundled" javascript file on my machine. How can I generate a physical bundled javascript file so I can "register" it in my wordpress php code? I'm building a small wordpress plugin that will use reactjs on the client side. 
  Am I missing something obvious? </p>