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

How to Set Up a Wildcard Subdomain DNS Record in Cloudflare

If you need all subdomains (e.g., *.example.com) to point to the same IP or service, a wildcard D...

Fix 'port already allocated' for Nginx in Docker Compose

You're starting your Docker Compose setup with Nginx, and you see "port is already alloca...

Fix npm install Permission Denied Due to Incorrect Node Ownership

When you run npm install and see a permission denied error, it's often because t...

Fix ERR_CONNECTION_RESET Caused by Chrome Extensions

If you see the ERR_CONNECTION_RESET error in Chrome, it often means a network connection was inte...

Fix Nginx Upstream Connection Refused in Proxy Pass