feat product.rb: task #7

must be greater or equal to zero.

Author: Pauloparakleto

app/models/product.rb

@@ -42,7 +42,7 @@ class Product < ApplicationRecord
 
   with_options presence: true do
     validates :name
-    validates :price, numericality: { greater_than: 0 }
+    validates :price, numericality: { greater_than_or_equal_to: 0 }
   end
 
   after_save :synchronize_stock