ENV VARS:
To set Unicorn on Heroku add this config var: heroku config:set WEB_CONCURRENCY=6
Facebook app credentials:
FOR PRODUCTION ON HEROKU:
heroku config:set FB_APP_ID=the_facebook_app_id heroku config:set FB_APP_SECRET=the_facebook_app_secret
FOR YOUR LOCAL DEVELOPMENT:
Add this file (not tracked for security) "/config/initializers/dev_environment.rb" with this content: unless Rails.env.production? ENV["FB_APP_ID"]="the_facebook_app_id" ENV["FB_APP_SECRET"]="the_facebook_app_id" end