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Fix Nginx Upstream Connection Refused in Docker - Docker Nginx 502 Bad Gateway: Memory Limit Fix-Firefox Secure Connection Failed: Date and Time Fix

2026-07-28 16:21:43office-tools
Fix Nginx Upstream Connection Refused in Docker - Docker Nginx 502 Bad Gateway: Memory Limit Fix-Firefox Secure Connection Failed: Date and Time Fix

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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