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Fix Nginx 502 Bad Gateway on Docker Ubuntu - Fixing Node Version Mismatch with package.json Engines-Troubleshooting Permission Denied for pip install -r requirements.txt

2026-07-28 12:03:11
Fix Nginx 502 Bad Gateway on Docker Ubuntu - Fixing Node Version Mismatch with package.json Engines-Troubleshooting Permission Denied for pip install -r requirements.txt

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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