The combo of Facebook’s create-react-app and Heroku’s buildpack makes React development very easy.
$ npm install -g create-react-app
$ create-react-app my-app
$ cd my-app
$ git init
$ heroku create -b https://github.com/mars/create-react-app-buildpack.git
$ git add .
$ git commit -m "react-create-app on Heroku"
$ git push heroku master
$ heroku open