spinnaker: Halyard:stable container expects script to run with sudo but doesn't have sudo permissions

Issue Summary:

Running hall deploy apply on the stable container (gcr.io/spinnaker-marketplace/halyard:stable) will result in error that it expects the script to be run with sudo.

/home/spinnaker/.hal/default/install.sh must be executed with root permissions; exiting

I tried to do sudo hal deploy apply but the halyard container doesn’t not have sudo installed and won’t let me install it, since the spinnaker user is not a sudoer bash: sudo: command not found

Cloud Provider(s):

kubernetes (minikube)

Steps to Reproduce:

Follow the steps on spinnaker.io/setup/install/ to deploy spinnaker to a kubernetes cluster (in my case a minikube cluster), Configure everything as instructed (Roles, Kube Config, GCS bucket,…)

For halyard choose the option of running halyard in docker (instead of on ubuntu) in last step of the instruction, inside the halyard container, run hal deploy apply and you will get this error /home/spinnaker/.hal/default/install.sh must be executed with root permissions; exiting

Additional information

$ hal -v
1.2.0-20180509113540

I tried to modify the Dockerfile on halyard repo locally and built this Dockerfile

FROM gcr.io/spinnaker-marketplace/halyard:stable

USER root

That will let me become root and then add spinnaker to sudoers group, but I think that could be fixed in the original Dockerfile, if you agree I could make a PR for it.