Knowledge base for software setup, errors, and daily tool work.

Setting Up Cloudflare Wildcard Subdomains for Multiple Sites

If you manage multiple sites or services on different subdomains (like app.example.com, blog.exam...

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 'npm install' Permission Denied When Using Yarn

You run yarn install in a project and later try npm install only to hit...

Fix 'fatal: refusing to merge unrelated histories' in Git

You cloned a repository, made some commits locally, and now when you try to git pull...

Fix pnpm ERR! Cannot Find Module – Practical Steps

Fix Docker Nginx 502 Bad Gateway After Restart

After restarting your Docker containers, you might see a 502 Bad Gateway error when accessing you...