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Fix Docker Compose Environment Variable Substitution Failed - How to Resolve Port 5432 Already Allocated in Docker-How to Fix Git Merge Conflicts Between Two Branches

Updated 2026-07-28 15:32:26macos-help

Fix Docker Compose Environment Variable Substitution Failed - How to Resolve Port 5432 Already Allocated in Docker-How to Fix Git Merge Conflicts Between Two Branches

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.