Checklists for software errors, setup, and tool workflows.

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Fix Nginx Config Test 'Permission Denied' Error

Running nginx -t and seeing 'permission denied' can stop you from reloading ...

Fix 'Permission Denied' Error When Saving VS Code settings.json

You open VS Code's settings.json (either user or workspace), make a change, and try to save. ...

Fixing Nginx 502 Bad Gateway in Docker: Practical Steps

You set up Nginx as a reverse proxy in Docker, but instead of your app you see a 502 Bad Gateway....

VSCode IntelliSense Not Working for JavaScript: Fixes

You open a JavaScript file in VSCode, but IntelliSense is silent — no autocompletions, no suggest...

Docker Compose .env File Not Loading: Common Fixes

You set environment variables in a .env file next to your docker-compose.yml