Checklists for software errors, setup, and tool workflows.

VS Code IntelliSense Not Working for Python: Common Fixes

You open a Python file in VS Code, start typing, and no suggestions appear. IntelliSense is silen...

Docker Container Exits Immediately After Entrypoint

You run a Docker container and it stops within seconds. The logs show your entrypoint script ran,...

Fix Nginx 502 Bad Gateway with Docker Multiple Containers

If you run Nginx as a reverse proxy in front of multiple Docker containers, a 502 Bad Gateway err...

Fix Nginx Configuration Test Failure After Adding Proxy Pass

You add a proxy_pass directive to an Nginx server block, run nginx -t, ...

How to Fix Nginx 502 Bad Gateway in Docker Logs

If your Nginx container shows a 502 Bad Gateway error, it usually means Nginx cannot...

Fix Git index.lock File Exists Permission Denied Error

You're in the middle of a Git operation and suddenly you see:

fatal: Unable to ...