Unsupported challenge type from registry

[kimpenhaus]

hey @nicholas-fedor

first of all thanks for taking action and continuing and modernizing watchtower - really appreciate your efforts 🙏🏼

today I tried to migrate from the original container image to the one you published nickfedor/watchtower:latest. I didn't changed anything despiate the image ref. when the first scan started I realized that got an error:

Unsupported challenge type from registry | challenge=image=registry.my-domain.net/my-conatiner-image:latest

I then added debug logging to see what the issue might be - but it doesn't help me resolving that issue. to give you some more information - the registry registry.my-domain.net is a self-hosted container registry based on the official registry image registry:latest. there is not auth required (as it is running in the same docker env and is not available from the internet). when using the original image that wasn't a problem and was working as expected.

it appears on every run:

do you have any idea what might cause the issue here?

thanks in advance,
m.

[nicholas-fedor]

This has been migrated to #309