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Nginx Upstream Connection Refused: Fixing localhost Errors - How to Fix Nginx 502 Bad Gateway in Docker Compose-Nginx Upstream Connection Refused: Quick Fix

Updated 2026-07-28 08:05:52developer-tools
Nginx Upstream Connection Refused: Fixing localhost Errors - How to Fix Nginx 502 Bad Gateway in Docker Compose-Nginx Upstream Connection Refused: Quick Fix
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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