Single database for multiple shops

Use ActsAsTenant as Multi-tenancy for shops

See below files:
- app/controllers/concern/multi_tenancy.rb
- app/models/application_record.rb
- app/models/shop.rb

An initializer can be created to control option in ActsAsTenant.
config/initializers/acts_as_tenant.rb
require 'acts_as_tenant/sidekiq'
ActsAsTenant.configure do |config|
  config.require_tenant = false # true
end

more details: https://github.com/ErwinM/acts_as_tenant

app/controllers/origami/order_reservation_controller.rb

@@ -4,7 +4,7 @@ class Origami::OrderReservationController < BaseOrigamiController
   	@order = OrderReservation.latest_order #.active
     @count_on_order = OrderReservation.get_count_on_order
     @count_on_completed = OrderReservation.get_count_on_completed
-    @shop = Shop.find_by_id(1)
+    @shop = Shop.current_shop
     @receipt_bill = check_receipt_bill
   end