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Nginx Upstream Connection Refused: Fixing localhost Errors - How to Set Environment Variables in Docker Compose-How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome

Updated 2026-07-28 16:57:35developer-tools
Nginx Upstream Connection Refused: Fixing localhost Errors - How to Set Environment Variables in Docker Compose-How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome
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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