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/api/bill_controller.rb

@@ -106,7 +106,7 @@ class Api::BillController < Api::ApiController
 
     # unique_code = "ReceiptBillPdf"
     # #shop detail
-    # shop_details = Shop.find(1)
+    # shop_details = Shop.current_shop
 
     # customer= Customer.find(@sale_data.customer_id)
     # # get member information