Add LOG_LEVEL env var to control default miner log level without editing the logger file

[Rakambda]

Pull Request Etiquette

Checklist

• Tests have been added in relevant areas
• Corresponding changes made to the documentation (README.adoc)

Type of change

New Feature

Description

Title

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.44%. Comparing base (37025db) to head (d71d138).
Report is 14 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #959   +/-   ##
==========================================
  Coverage      85.44%   85.44%           
  Complexity      1119     1119           
==========================================
  Files            202      202           
  Lines           3512     3512           
  Branches         263      263           
==========================================
  Hits            3001     3001           
  Misses           455      455           
  Partials          56       56           

Flag	Coverage Δ
unittests-miner	85.82% <ø> (ø)
unittests-viewer	58.33% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.