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Docker Compose Env Variable Not Available in Container: Fix - How to Fix Port Already Allocated in Docker Compose-How to Merge Two Git Repositories with Unrelated Histories

Updated 2026-07-28 09:30:37developer-tools
Docker Compose Env Variable Not Available in Container: Fix - How to Fix Port Already Allocated in Docker Compose-How to Merge Two Git Repositories with Unrelated Histories
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.