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Docker Compose Environment Variable from Shell Not Working: Fixes - DNS Probe Finished NXDOMAIN Error Explained-Fix 'port already allocated' Error in Docker Compose

Updated 2026-07-28 10:29:07office-tools
Docker Compose Environment Variable from Shell Not Working: Fixes - DNS Probe Finished NXDOMAIN Error Explained-Fix 'port already allocated' Error in Docker Compose
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.