Bug report: Image doesn't work properly with Watchtower

[brhahlen]

Describe the bug
When using Cyberchef with https://github.com/containrrr/watchtower, the following error occurs:

Could not do a head request for "ghcr.io/gchq/cyberchef:latest", falling back to regular pull.
Reason: registry responded to head request with "404 Not Found", auth: "not present"

According to containrrr/watchtower#1528, this has to do with how the docker image is being build.

To Reproduce
Steps to reproduce the behaviour or a link to the recipe / input used to cause the bug:

1. Set up CyberChef in Docker
2. Set up Watchtower in Docker
3. Wait for update check
4. See error

Expected behaviour
Watchtower would be able to do a proper head request and get the right information.

Screenshots

Desktop (if relevant, please complete the following information):

• OS: Fedora
• Browser: N/A
• CyberChef version: latest - 10.18.8

Additional context
Add any other context about the problem here.