[App] Show logs command to be standalone and re-usable

[tchaton]

What does this PR do?

This PR does a bit of cleaning of the logs, so it can be used externally.

Fixes #<issue_number>

Does your PR introduce any breaking changes? If yes, please list them.

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cc @Borda

[lantiga]

Looks great! Only missing some test coverage

[ethanwharris]

LGTM, small comments