As per: https://docs.nginx.com/nginx-ingress-controller/installation/installation-with-helm/

I'm trying to install ingress-nginx with custom ports, but it does not expose those ports when I pass in the controller.customPorts parameter. I think I'm not passing it in the right format. The documentation says

A list of custom ports to expose on the NGINX ingress controller pod. Follows the conventional Kubernetes yaml syntax for container ports.

Can anyone explain to me what that format should be?