refactor/checkout (#8)

Co-authored-by: matst80 <mats.tornberg@gmail.com>
Reviewed-on: #8
Co-authored-by: Mats Törnberg <mats@tornberg.me>
Co-committed-by: Mats Törnberg <mats@tornberg.me>

cmd/cart/k8s-host-discovery.go

@@ -6,6 +6,7 @@ import (
 	"git.k6n.net/go-cart-actor/pkg/actor"
 	"git.k6n.net/go-cart-actor/pkg/cart"
 	"git.k6n.net/go-cart-actor/pkg/discovery"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 )
@@ -24,7 +25,11 @@ func GetDiscovery() discovery.Discovery {
 	if err != nil {
 		log.Fatalf("Error creating client: %v\n", err)
 	}
-	return discovery.NewK8sDiscovery(client)
+	timeout := int64(30)
+	return discovery.NewK8sDiscovery(client, v1.ListOptions{
+		LabelSelector:  "actor-pool=cart",
+		TimeoutSeconds: &timeout,
+	})
 }
 
 func UseDiscovery(pool actor.GrainPool[*cart.CartGrain]) {