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 &#...

Docker Container Exits Immediately After Start: Network Fixes

You start a Docker container and it exits right away. The container logs show no errors, or the e...

Fix Chrome Black Screen on Startup Due to Hardware Acceleration

If Chrome opens to a black screen after you launch it, the issue often involves hardware accelera...

Cloudflare Wildcard Subdomain CNAME Setup Guide

If you need to route all subdomains (e.g., *.example.com) to the same target, a wildcard CNAME re...

Fix VS Code Breakpoint Not Hit in Docker Container

You set a breakpoint in VS Code, run your app inside a Docker container, and the breakpoint is ne...

Fix 'port already allocated' Error in Docker Compose

You run docker compose up and see port is already allocated. This means...