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Docker Container Exits Immediately: How to Find Logs and Fix It - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Docker Compose PostgreSQL Port Conflict

Updated 2026-07-28 14:16:41office-tools
Docker Container Exits Immediately: How to Find Logs and Fix It - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Docker Compose PostgreSQL Port Conflict
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.

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