Add price to prisma schema

prisma/schema.prisma

@@ -32,6 +32,7 @@ model Pizza {
   id           Int            @id @default(autoincrement())
   name         String         @unique
   description  String?
+  price        Decimal
   restaurant   Restaurant     @relation(fields: [restaurantId], references: [id])
   restaurantId Int
   orders       PizzaToOrder[]