http://humanwebdevelopment.com/rails-production-and-staging-environments-for-heroku/
$ heroku config:add RACK_ENV=staging RAILS_ENV=staging --remote staging $ git push production master $ heroku run rake db:migrate --remote production
http://humanwebdevelopment.com/rails-production-and-staging-environments-for-heroku/
$ heroku config:add RACK_ENV=staging RAILS_ENV=staging --remote staging $ git push production master $ heroku run rake db:migrate --remote production