Fix Nginx 502 Bad Gateway with Docker Environment Variables
If you see a 502 Bad Gateway from nginx running in Docker, it usually means ngin...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Cloudflare Error 521: Server Not Responding
Cloudflare error 521 appears when your origin server refuses the connection from Cloudflare's...
Fix Nginx 'upstream connection refused' When Talking to PHP-FPM
You're seeing upstream connection refused in your Nginx error log, and your site...
Docker Compose Environment Variable Not Set in Dockerfile
You set an environment variable in your docker-compose.yml file, but when you try to...
How to Fix Git Detached HEAD State and Undo Changes
You run git status and see something like "HEAD detached at abc123". This ha...
Docker Compose Environment Variable Not Updating? Fix It
You update a variable in your docker-compose.yml or .env file, run
Topic paths
Quick titles
Windows Update Error 0x80070002 Repair GuideWindows 10 Explorer.exe Keeps Crashing? Fix It NowChrome Freezes at Launch on Mac – Troubleshooting GuideResolving pnpm Missing Module ErrorsFix Windows Search Indexing Permission Denied ErrorTroubleshoot Docker Volume Permission for NginxNginx 502 Bad Gateway Docker Socket FixWindows Security App Won't Open: Fixes That Work