fix: don't use pointers in interfaces

internal/bootstrap/service_bootstrap.go

@@ -15,11 +15,16 @@ func (app *BootstrapApp) setupServices() error {
 		return fmt.Errorf("failed to setup policy engine: %w", err)
 	}
 
-	err = app.dig.Provide(app.getLabelProvider)
+	labelProvider, err := app.getLabelProvider()
+
 	if err != nil {
-		return fmt.Errorf("failed to provide label provider: %w", err)
+		return fmt.Errorf("failed to get label provider: %w", err)
 	}
 
+	err = app.dig.Provide(func() service.LabelProvider {
+		return labelProvider
+	})
+
 	err = app.dig.Provide(service.NewLdapService)
 	if err != nil {
 		return fmt.Errorf("failed to provide ldap service: %w", err)
@@ -107,6 +112,15 @@ func (app *BootstrapApp) getLabelProvider() (service.LabelProvider, error) {
 				return nil, fmt.Errorf("failed to invoke kubernetes service: %w", err)
 			}
 
+			// Kubernetes will fail to initialize with an error if it cannot connect to the cluster
+			// but just to be safe, we check if the service is nil and log a warning if it is
+			if app.services.kubernetesService == nil {
+				if app.config.LabelProvider == "kubernetes" {
+					app.log.App.Warn().Msg("Kubernetes label provider selected but Kubernetes is not available, will continue without it")
+				}
+				return nil, nil
+			}
+
 			return app.services.kubernetesService, nil
 		}