Ensure HTTPS is enabled on Kubernetes Ingress resource

Enabling end-to-end TLS encryption can help keep data in-transit protected. In addition, using the latest version of TLS and modern ciphers can help keep data in-transit protected from man-in-the-middle and similar attacks.

In the Kubernetes Ingress YAML file, add an annotation for kubernetes.io/ingress.allow-http and set it to false.

References:
https://cloud.google.com/kubernetes-engine/docs/concepts/ingress-xlb#disabling_http