add rake file

lib/tasks/setup.rake

@@ -0,0 +1,14 @@
+namespace :setup do
+	desc "Lookup for serial no"
+	task set_serial_no: :environment do
+		find_lookup=Lookup.where('name=?','generate_serial_no')
+		if find_lookup.empty?			    
+		  	lookup= Lookup.new
+		  	lookup.name="generate_serial_no"
+		  	lookup.max_value=0
+		  	lookup.prefix='0000'
+		  	lookup.max_length=16
+		  	lookup.save			 
+		end
+  	end  	 
+end