Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Update Error 0x80070002 on Windows 11
If you see error 0x80070002 when running Windows Update on Windows 11, it usually means Windows c...
Using Git LFS Migrate on an Existing Repository
If you have a Git repository that already contains large files—like binaries, archives, or datase...
Docker Compose Env Variable Not Available in Container: Fix
You define an environment variable in your docker-compose.yml file, but when you run...
npm package.json Not Found After npm init
You run npm init, answer the prompts, and then try to install a package or run a scr...
Fix Missing Taskbar Icons in Windows Notification Area
You look down at the notification area (system tray) and an icon you rely on—like volume, network...
Topic paths
Quick titles
Resolve 'Permission denied' for Python pip User InstallFix Chrome ERR_CONNECTION_RESET ErrorFix Source Control Not Showing Changes in VS CodeResolve Git SSL Error 'unable to get local issuer certificate'Resolve Windows 11 Update Stuck on 0 PercentFix pnpm ERR! Cannot Find Module – Practical StepsHow to Fix Python Dependency Conflicts Between Requirements FilesFix Edge Sync Not Working After Update