Checklists for software errors, setup, and tool workflows.

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VS Code Git Not Detecting Changes in Workspace: Fixes

You open VS Code, make edits, and expect to see them in the Source Control panel. But nothing sho...

Docker Nginx 502 Bad Gateway: Memory Limit Fix

You're running Nginx in Docker as a reverse proxy, and suddenly you see 502 Bad Gateway error...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Python Virtual Environment Not Activating on Mac: Fixes

You open Terminal, run source venv/bin/activate, and nothing happens—or you get an e...

Fix 'Port Already Allocated' Error in Docker Compose on Windows

You try to run docker compose up and get an error like "port is already allo...

Update Git SSL Certificates to Fix 'unable to get local issuer'
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...