feat: implement logger

app/service/cartsService/cartsService.go

@@ -1,6 +1,7 @@
 package cartsService
 
 import (
+	"git.ma-al.com/goc_daniel/b2b/app/internal/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/model"
 	"git.ma-al.com/goc_daniel/b2b/app/repos/cartsRepo"
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
@@ -34,6 +35,15 @@ func (s *CartsService) CreateNewCart(user_id uint, name string) (model.CustomerC
 
 	// create new cart for customer
 	cart, err = s.repo.CreateNewCart(user_id, name)
+	if err != nil {
+		return cart, err
+	}
+
+	logger.Info("cart created",
+		"service", "cartsService",
+		"user_id", user_id,
+		"cart_id", cart.CartID,
+	)
 
 	return cart, nil
 }