froots/sinatra-heroku-boilerplate — pull request #1 by kevinold (2012-01-11 03:49:19+00:00)
Title: Update :public to :public_folder

I receved this message after pushing to heroku which prompted this
change.

2012-01-09T15:58:24+00:00 app[web.1]: :public is no longer used to avoid
overloading Module#public, use :public_folder instead