Consider all SHA's of a manifest

[davidcollom]

This was initially started in bringing OS/Arch Support to version-checker, but as things progressed.

I releasied that whilst it would be nice and efficient if we only returned Tags that were for the macthing OS, it felt like we'd be caching more and more of the same data (albeit for different os/arch)

Therefore, adding a Children/Child field to an ImageTag allows us to add multiple SHA's to the same tag (essentially brining multi-arch). Caching this as all one object also means we cache it once!

if a Tag were to be updated, then all SHA Digests would be updated and modified so the same outcome occurs as before.

I have tested this with the following Clients:

• Docker
• GCR
• Quay
• SelfHosted (via Harbour)
• GHCR
• ECR

resolves #212

[paulwilljones]

not sure this is in the response
https://docs.docker.com/reference/api/hub/latest/#tag/repositories/paths/~1v2~1namespaces~1%7Bnamespace%7D~1repositories~1%7Brepository%7D~1tags/get

[davidcollom]

I discovered it whilst looking up / using some test/sample data - I.E: within the current response:

https://registry.hub.docker.com/v2/repositories/davidcollom/hub3-exporter/tags

[aidy]

I suspect that it would be better to represent this as

type ImageTag struct {
    Tag string
    Manifests []Manifest
}

type Manifest {
   SHA string
   Timestamp time.Time
   OS OS
   Architecture Architecture
}