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Docker Compose Secret vs Environment Variable: When to Use Each - How to Fix Shared Folder Access in Windows-Troubleshoot Cloudflare 521 Error Caused by Overload

Updated 2026-07-28 15:24:29developer-tools
Docker Compose Secret vs Environment Variable: When to Use Each - How to Fix Shared Folder Access in Windows-Troubleshoot Cloudflare 521 Error Caused by Overload
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.