refactor: Use pointers for controllers

router/controller/service/controller.go

@@ -16,7 +16,7 @@ type Controller struct {
 	serviceRepository repository.Service
 }
 
-func (c Controller) New() controller.Controller {
+func (c *Controller) New() controller.Controller {
 	return &Controller{
 		serviceRepository: repository.NewServiceRepository(),
 	}