Allow protokube to be a staged assets

[chrislovecnm]

The asset API does not currently allow for protokube to be staged in a docker registry. This needs to be implemented.

1. assets phase should d/l the tarball
2. extract the tarball
3. docker install the container locally
4. push the container to the registry

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[chrislovecnm]

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[johngmyers]

Protokube is a file asset, so is copied to the URL in the spec.assets.fileRepository. Why is there a requirement to turn it into an image pushed to the spec.assets.containerRegistry?

[chrislovecnm]

@johngmyers this was opened two years ago. Things may have changed since then.

One reason, if I remember is that we cannot use a registry vulnerability scanner on protokube since it is a file asset.

[johngmyers]

If it's for vulnerability scanning, then there is no requirement for the bootstrap script to pull it from the registry. A toolbox command would be a possible implementation. This is useful information.