switch from K3S_CLUSTER_SECRET to K3S_TOKEN and use exact matching to get node containers by name and make --cluster flag required when creating a new node
cmd.Flags().Int("replicas",1,"Number of replicas of this node specification.")
cmd.Flags().String("role",string(k3d.WorkerRole),"Specify node role [master, worker]")
cmd.Flags().StringP("cluster","c","","Select the cluster that the node shall connect to.")
cmd.Flags().StringP("cluster","c","","[REQUIRED] Select the cluster that the node shall connect to.")
iferr:=cmd.MarkFlagRequired("cluster");err!=nil{
log.Fatalln("Failed to mark required flag '--cluster'")
}
cmd.Flags().String("image",fmt.Sprintf("%s:%s",k3d.DefaultK3sImageRepo,version.K3sVersion),"Specify k3s image used for the node(s)")// TODO: get image version tag