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

Enable Wildcard Subdomain in Cloudflare: Step-by-Step

If you need all subdomains (like *.example.com) to point to the same server, a wildc...

How to Force Enable Windows Defender Real-Time Protection

Windows Defender real-time protection sometimes gets disabled by group policies, third-party anti...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Chrome Certificate Error: Invalid Authority SSL Certificate

If Chrome shows 'Your connection is not private' with 'NET::ERR_CERT_AUTHORITY_INVALI...

pnpm Setup Checklist for Windows: Step-by-Step Guide

If you're setting up pnpm on Windows and running into issues like command not found, permissi...

How to Fix Git Detached HEAD State and Undo Changes

You run git status and see something like "HEAD detached at abc123". This ha...