Checklists for software errors, setup, and tool workflows.

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Latest checklists

When running docker build, you might see an error like build context canceled<...

Fix Docker Compose 'Port Already Allocated' for MySQL
You run docker compose up and get an error like Error: Port 3306 is already al...

Fix Nginx 'Permission Denied' Upstream Errors
When Nginx logs permission denied while connecting to an upstream (e.g., a Unix sock...

Fix VS Code Terminal Not Working After Update
After a VS Code update, the integrated terminal may fail to start, show a blank window, or displa...

How to Resolve Cloudflare 522 Timeout Error
When you see a Cloudflare 522 timeout error, it means Cloudflare successfully connected to your o...

Prevent Git Index Lock File Creation: Practical Fixes
If you see fatal: Unable to create 'path/to/.git/index.lock': File exists., ...