add readme

README.md

@@ -299,6 +299,9 @@ settings/lookups => {type:display_type, name: Display Type, value: 2}
 For show total before tax in receipt bill
 settings/lookups => {type:show_total_before_tax, name:Show Total Before Tax, value: {0 or 1}}
 
+For Using Staff Meal
+settings/lookups => { type:customer_type, name: Staff, value:Staff }
+
 * ToDo list
 
 1. Migration