title: How to inject the interface of a service in the constructor of a controller in Nestjs?
body: <p>I have an app that receives a service as a dependency on the controller, so far so good, but I would like to find a way to instead of declaring the specific implementation of that service, to be able to &quot;ask&quot; from the controller for the interface that this service implements to decouple of the concrete implementation of that service. How is this done in nest js?</p>