fix: handle nil maps in flagd-standalone

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

Author: toddbaert

controllers/core/flagd/resources/deployment.go

@@ -111,9 +111,15 @@ func (r *FlagdDeployment) GetResource(ctx context.Context, flagd *api.Flagd) (cl
 	// override settings for the injected container for flagd standalone deployment mode
 	deployment.Spec.Template.Spec.ImagePullSecrets = imagePullSecrets
 	if len(r.FlagdConfig.Labels) > 0 {
+		if deployment.Spec.Template.ObjectMeta.Labels == nil {
+			deployment.Spec.Template.ObjectMeta.Labels = map[string]string{}
+		}
 		maps.Copy(deployment.Spec.Template.ObjectMeta.Labels, r.FlagdConfig.Labels)
 	}
 	if len(r.FlagdConfig.Annotations) > 0 {
+		if deployment.Spec.Template.ObjectMeta.Annotations == nil {
+			deployment.Spec.Template.ObjectMeta.Annotations = map[string]string{}
+		}
 		maps.Copy(deployment.Spec.Template.ObjectMeta.Annotations, r.FlagdConfig.Annotations)
 	}
 	deployment.Spec.Template.Spec.Containers[0].Image = fmt.Sprintf("%s:%s", r.FlagdConfig.Image, r.FlagdConfig.Tag)