Add liveness endpoint.
This is a simple endpoint that just returns 200s right now, but it's nice to have an endpoint that can be used to see if the KMS is up. In the future we can add more liveness logic to it.
This is a simple endpoint that just returns 200s right now, but it's nice to have an endpoint that can be used to see if the KMS is up. In the future we can add more liveness logic to it.