Checklists for software errors, setup, and tool workflows.

Fix Nginx 502 Bad Gateway with Docker and PHP-FPM

You have a Docker setup with Nginx proxying to a PHP-FPM container, and you're getting a 502 ...

Taskbar Icons Missing But Taskbar Visible: Fixes

You see the taskbar at the bottom of your screen, but the icons—like the Start button, search bar...

Fix Nginx Permission Denied on CentOS: A Practical Guide

You're setting up Nginx on CentOS and hitting a 'permission denied' error in the erro...

Docker Container Exits Immediately with Volume Mount – Fixes

You start a Docker container with a volume mount, and it exits immediately – no error, or just a ...

Fix 'npm permission denied' in VS Code Terminal

When you see a 'permission denied' error in the VS Code terminal while running npm comman...

How to Fix Git Merge Unrelated Histories Error

You run git pull or git merge and get:

fatal: refusing to...