let's encrypt for traefik ingress controller

[bensonz]

Use Let's encrypt to generate certificates and auto-renew them.

[bensonz]

Here's an example on how to use let's encrypt with traefik : kubernetes-ingress-controller-with-traefik-and-lets-encrypt

kube-lego is under non-production use case, also may not support traefik.
kube-cert-manager could be another option.