Expose LocalDebian Spinnaker on a public IP address not Work

I’m try to expose Spinnaker on a public ip without authentication (Just for demo purpose.). And i am doing this refer to : https://blog.spinnaker.io/exposing-spinnaker-to-end-users-4808bc936698

We’ll specify the 0.0.0.0 host in both gate.yml and deck.yml in our default Halyard deployment with this command:

echo “host: 0.0.0.0” | tee
~/.hal/default/service-settings/gate.yml
~/.hal/default/service-settings/deck.yml
sudo hal deploy apply

However, it not work for me… Dose this feature still support NOW? Spinnaker version “1.15.0”