chore: Use env variable for root log level (DEV-3410)

[siers]

Pull Request Checklist

Tested locally with test code, however, docker-compose hasn't been tested, but the definition is correct.

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)
• deprecated: Deprecation warning (ideally referencing a migration guide)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[linear]

DEV-3410 Make API log level configurable

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.78%. Comparing base (62260e4) to head (f080e84).
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3165      +/-   ##
==========================================
- Coverage   88.79%   88.78%   -0.01%     
==========================================
  Files         265      265              
  Lines       22260    22220      -40     
==========================================
- Hits        19765    19729      -36     
+ Misses       2495     2491       -4     

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[BalduinLandolt]

LGTM