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Fix 'Port Already Allocated' Error in Docker Compose on Mac - Fixing Nginx 502 Bad Gateway with Docker and Load Balancers-Downgrading Node.js for Package Compatibility

Updated 2026-07-28 16:43:22developer-tools
Fix 'Port Already Allocated' Error in Docker Compose on Mac - Fixing Nginx 502 Bad Gateway with Docker and Load Balancers-Downgrading Node.js for Package Compatibility
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.