Update amqp-order-handler.go

cmd/cart/amqp-order-handler.go

@@ -51,13 +51,14 @@ func (h *AmqpOrderHandler) OrderCompleted(body []byte) error {
 	defer cancel()
 
 	return ch.PublishWithContext(ctx,
-		"orders", // exchange
-		"new",    // routing key
+		"",       // exchange
+		"orders", // routing key
 		false,    // mandatory
 		false,    // immediate
 		amqp.Publishing{
-			ContentType: "application/json",
-			Body:        body,
+			DeliveryMode: amqp.Persistent,
+			ContentType:  "application/json",
+			Body:         body,
 		})
 
 }