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Docker Compose Multiple Environment Files Not Merging? Fix Here - How to Fix Cloudflare Error 521: Server Not Responding-Resolving npm run build Errors on macOS

Updated 2026-07-28 13:30:33developer-tools
Docker Compose Multiple Environment Files Not Merging? Fix Here - How to Fix Cloudflare Error 521: Server Not Responding-Resolving npm run build Errors on macOS
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.

More repair notes

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