Fix Nginx 502 Bad Gateway on Docker Ubuntu - Git Merge Conflict Markers Explained-ERR_NAME_NOT_RESOLVED Troubleshooting Steps

Updated 2026-07-28 06:22:12backup-recovery
Fix Nginx 502 Bad Gateway on Docker Ubuntu - Git Merge Conflict Markers Explained-ERR_NAME_NOT_RESOLVED Troubleshooting Steps
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.