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

Fix Docker Nginx 502 Bad Gateway with MySQL

You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...

Docker Image Pull Access Denied: Troubleshooting Checklist

When you run docker pull and get an access denied error, it usually mea...

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

Symptom

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

How to Speed Up Cloudflare DNS Propagation

When you change DNS records in Cloudflare, propagation can sometimes feel slow. While you can'...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Chrome Sync Not Working with VPN: Fixes and Checks

If Chrome sync stops working after you turn on a VPN, you're not alone. The VPN can interfere...