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

Nginx Upstream Connection Refused: Fixing localhost Errors

You set up an nginx reverse proxy to forward requests to a backend service on localhost, but ngin...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

Fix Cloudflare Wildcard Subdomain DNS Propagation Delay

You set up a wildcard DNS record (e.g., *.example.com) in Cloudflare, but new subdom...

Fix Firefox Secure Connection Failed on Mac

If you see "Secure Connection Failed" in Firefox on your Mac, the browser is blocking the...

Fix Docker 'No Space Left on Device' on Windows

If you see 'no space left on device' when running Docker on Windows, your Docker virtual ...

Fix Cloudflare SSL Full Strict Error 526

If you see error 526 in your browser when using Cloudflare with SSL set to Full (Strict), it mean...