Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused Timeout Error

When Nginx returns 502 Bad Gateway or logs upstream connection refused timeout...

Fix Docker Desktop Engine Stopped After Sleep Mode
You wake your computer from sleep, open Docker Desktop, and see the engine is stopped. The whale ...

How to Fix Nginx 'Upstream Connection Refused' Error
When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...

Fix Nginx 502 Bad Gateway with Docker and PHP-FPM
You have a Docker setup with Nginx proxying to a PHP-FPM container, and you're getting a 502 ...

Fix Windows Explorer Restarting with SFC Scannow
If Windows Explorer keeps restarting on its own—your taskbar disappears and reappears, or File Ex...

Fix Docker Compose Port Already Allocated for PostgreSQL
You run docker-compose up and see an error like "Error starting userland pro...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused Timeout Error

Fix Docker Desktop Engine Stopped After Sleep Mode

How to Fix Nginx 'Upstream Connection Refused' Error

Fix Nginx 502 Bad Gateway with Docker and PHP-FPM

Fix Windows Explorer Restarting with SFC Scannow

Fix Docker Compose Port Already Allocated for PostgreSQL

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