POST http://localhost:9000/orders
Content-Type: application/json

{
    "customer_id": 7,
    "restaurant_id": 3,
    "items": [
      {"dish_id": 12, "name": "Pizza Margherita", "price": 11.50},
      {"dish_id": 8,  "name": "Tiramisu",         "price": 5.00}
    ],
}