Docker Container Exits Immediately: No Error, Common Fixes - npm Build Fails: PostCSS Troubleshooting-Fixing Nginx 502 Bad Gateway in Docker: Practical Steps

Updated 2026-07-28 14:26:55developer-tools
Docker Container Exits Immediately: No Error, Common Fixes - npm Build Fails: PostCSS Troubleshooting-Fixing Nginx 502 Bad Gateway in Docker: Practical 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.