Cloud build is also really useful for devs that have limited resources
to build Kaniko locally. This commit makes adds parameters to cloudbuild
to make it easy to adjust to your own project.
I was seeing an error with our cloudbuild triggers where the tagged
:latest version of image wasn't the same as the :commit version, even
though it was created via 'docker tag image:commit image:latest'.
I'm not sure why this would be happening, but for now building each
image separately should hopefully fix this error.