docs: add port and useSsl options and set default value for hostname …

[Anefu]

…and usePathStyle glasskube#461

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Proposed Changes

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<type>: <description> (#<issue number>)

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Description

These changes add the new options provided by glasskube#448

Related Issues

• Closes Improve docs to add GitLab custom registry information glasskube/operator#461

Checklist

• I have read and followed the contributing guidelines for this repository.
• My code follows the coding style and standards of this project.
• I have tested my changes locally.
• I have added or updated necessary documentation (if applicable).
• All new and existing tests passed.
• My changes have been reviewed by at least one other contributor.
• I have updated the README or relevant documentation (if applicable).
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