Original code has been writen by PanNyaa
Follow these commands to deploy to Heroku.
$ git clone https://github.com/ayumin/pannyaa-accesscounter.git
$ cd pannyaa-accesscounter
$ heroku create
$ heroku config:set DROPBOX_ACCESS_TOKEN={Your Dropbox Access Token}
$ git push heroku master
$ heroku open
see here.
Enjoy :)