Heroku Screenshot Server: PhantomJS

Deploying to Heroku

$ heroku create --stack cedar --buildpack http://github.com/stomita/heroku-buildpack-phantomjs.git
$ heroku config:add PUSH_SERVER_URL=http://<app name of nodejs screenshot server>.herokuapp.com/render.html
$ git push heroku master
$ heroku ps:scale renderer=<num of phantomjs screenshot renderer>