Description

Use numerical uid and gid for chown as they should always work even when the uid and gid have no names in /etc/...

in case the owner user does not exist in the image we get the following error:

open-dkim: Creating DKIM private key '/tmp/docker-mailserver/opendkim/keys/subdomain.example.com/mail.private'
chown: invalid user: 'UNKNOWN:UNKNOWN'

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change that does improve existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md or the documentation under docs/)
• If necessary, I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have added information about changes made in this PR to CHANGELOG.md

Info @wt-io-it