production.rb

set :deploy_to, "path_to_teambox_on_production_server"
set :rails_root, deploy_to + "/current"

after "deploy:update_crontab"

namespace :deploy do
  desc "Update the crontab file"
  task :update_crontab, :roles => :db do
    run "cd #{rails_root} && whenever --update-crontab #{application}"
  end
end