Don't force base image manifests to have a mediaType #40776
+7
−7
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The field is optional per the spec, and Docker seems to default to
application/vnd.docker.distribution.manifest.v2+json
(see the Docker CLI Manifest handling code) so we should try to handle this as well.Firing this PR off to see what it does to our tests, but a complete PR would need a test to pin the 'able to parse and publish a manifest without a mediaType' behavior down.