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Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Resolve Docker Build Timeout Errors-Resolving Permission Denied for Cloudflare Origin Cert

Updated 2026-07-28 07:54:24developer-tools
Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Resolve Docker Build Timeout Errors-Resolving Permission Denied for Cloudflare Origin Cert
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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