Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix 'node-sass build failed python not found' Error
If you see node-sass build failed python not found when running npm install

Cloudflare Origin Certificate Not Working After Renewal: Fixes
If your Cloudflare origin certificate stops working after renewal, you are likely seeing SSL erro...

Fix Cloudflare SSL Full Strict Error 526
If you see error 526 in your browser when using Cloudflare with SSL set to Full (Strict), it mean...

Fix Windows Explorer Restarting After Crash
If Windows Explorer (explorer.exe) crashes and then keeps restarting, you may see the desktop fla...

Docker Compose Environment Variable Not Working: Fixes
You define a variable in a .env file or directly in docker-compose.yml, but your container sees n...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused in Proxy Pass

Fix 'node-sass build failed python not found' Error

Cloudflare Origin Certificate Not Working After Renewal: Fixes

Fix Cloudflare SSL Full Strict Error 526

Fix Windows Explorer Restarting After Crash

Docker Compose Environment Variable Not Working: Fixes

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