How to set up GitHub Actions

[garywong-bc]

For GitHub, or any other external CI, it requires restricted access to OCP4.

RocketChat Reference(s):

• https://chat.pathfinder.gov.bc.ca/channel/devops-ocp4-migration?msg=Mo2xpbtq8FLiJAjjt

For further details:

• https://github.com/bcgov/platform-services-registry/blob/master/openshift/templates/cicd.yaml