Checklists for software errors, setup, and tool workflows.

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Latest checklists

You run npm install on Windows 10 and see errors like Error: EPERM: operation ...

Fix Docker Nginx 502 Bad Gateway with MySQL
You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...

Fix Nginx 502 Bad Gateway on Docker Ubuntu
You're running Nginx as a reverse proxy inside Docker on Ubuntu, and suddenly you see

Fix Docker Build Context Canceled by Excluding Files
You run docker build and after a long wait see context canceled. This o...

Fix 'Permission Denied' When Installing Python Packages Without sudo
If you see "Permission denied" when running pip install, you're not alon...

Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused