engine/config/initializers/locomotive.rb

require 'lib/locomotive.rb'
require 'lib/core_ext.rb'

Locomotive.configure do |config|
  config.default_domain = 'example.com'
  
  config.lastest_items_nb = 5
end

# TODO: embed them in Locomotive right after configure
ActionMailer::Base.default_url_options[:host] = Locomotive.config.default_domain + (Rails.env.development? ? ':3000' : '')

Rails.application.config.session_store :cookie_store, {
  :key => '_locomotive_session',
  :domain => ".#{Locomotive.config.default_domain}"
}