The script failed in various ways with manifest failures because
manifests might not exist when it tried to build deps. This adds some
dependency handling/queuing so that we don't start on the dependent
image until the dependee has been built on all arches and the manifest
pushed.
The script failed in various ways with manifest failures because manifests might not exist when it tried to build deps. This adds some dependency handling/queuing so that we don't start on the dependent image until the dependee has been built on all arches and the manifest pushed.