Log documentation

[Buphido]

Added LOG.md

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Reviewer checklist

• Read PR description: a summary about the changes is required
• Changelog updated
• Documentation: docs/{Reference, Cli, ...}, Docker and cli help/usage
• Pulled branch, manually tested
• Verified requirements are met
• Reviewed the code
• Reviewed the related tests

[vwuerbel]

Some change requests for better understanding and that they integrate well with the rest of the documentation