(bug): docker images are broken

[marcinkubica]

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Operating system

Linux

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Bug description

docker pull ghcr.io/coderamp-labs/gitingest:sha256-eefdfb1d1241c05437ed8d900bca6a2009a1a44459e29239f6a7d6283f2ad72d
sha256-eefdfb1d1241c05437ed8d900bca6a2009a1a44459e29239f6a7d6283f2ad72d: Pulling from coderamp-labs/gitingest
unsupported media type application/vnd.oci.empty.v1+json

It's also rare (and even bit extreme?) to tag only with sha256 - especially there are semversioned releases - this should be improved

Steps to reproduce

pull docker image

Expected behavior

docker pull passes
docker tag is reasonable (semver, short sha)

Actual behavior

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Additional context, logs, or screenshots

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