Add RKT_OPTS for docker logging
Add RKT_OPTS for docker logging

Without these there will be no logs under /var/log/containers.  Based on https://github.com/kubernetes/kubernetes/issues/27720  and   https://coreos.com/kubernetes/docs/latest/kubelet-wrapper.html#use-the-cluster-logging-add-on
kz8s/tack,kz8s/terraform-aws-coreos-kubernetes,ii/cncfdemo,yagonobre/tack