Schedule per container

Feature Request Checklist

• I checked existing issues and discussions for duplicates.
• This is a feature request, not a support question.

Problem Description

Hi,

It would be really nice to have possibility to override global schedule per container.

Desired Solution

New label ie: com.centurylinklabs.watchtower.schedule that would override global schedule to update containers.

Current Alternatives or Workarounds

Currently the workaround is to start two watchtower instances.

Additional Context

No response