Checklists for software errors, setup, and tool workflows.

How to Fix Git Push Rejected Non-Fast-Forward Upstream

When you run git push and see rejected! non-fast-forward, it means your...

How to Create a package.json for Your npm Project

If you're starting a Node.js project, you'll need a package.json file. This ...

Fixing Nginx 502 Bad Gateway in Docker Networks

You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...

Git Detached HEAD Warning Explained: Causes and Fixes

You see a warning: "You are in 'detached HEAD' state." This happens when you chec...

Windows 11 Update Stuck at 0%? Run System File Checker First

If your Windows 11 update is stuck at 0% for more than 30 minutes, corrupted system files are a c...

How to Fix Git Merge Unrelated Histories Error

You run git pull or git merge and get:

fatal: refusing to...