Knowledge base for software setup, errors, and daily tool work.

Docker Compose Env Variable Not Available in Container: Fix

You define an environment variable in your docker-compose.yml file, but when you run...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...

Fix Windows Security App Not Starting on Windows 11

You click the Windows Security icon or try to open it from Settings, but nothing happens. The app...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

Fix Docker 'No Space Left on Device' from Log Files

You try to start a container or pull an image and get no space left on device. Often...

How to Enable Bluetooth Service in Windows 11

If Bluetooth suddenly stops working in Windows 11—the icon disappears, devices won't pair, or...