app.json

{
  "name": "React Tutorial Server",
  "description": "Code from the React tutorial",
  "keywords": [ "react", "reactjs", "tutorial" ],
  "repository": "https://github.com/reactjs/react-tutorial",
  "logo": "https://facebook.github.io/react/img/logo.svg",
  "website": "http://facebook.github.io/react/docs/tutorial.html",
  "success_url": "/",
  "env" : {
    "BUILDPACK_URL": "https://github.com/heroku/heroku-buildpack-nodejs.git"
  }
}