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

Fix Chrome Black Screen During Videos: Hardware Acceleration

If you're watching a video in Chrome and the screen goes black (but audio continues), hardwar...

How to Fix Cloudflare Origin Certificate Validation Failed

If you see a "validation failed" error when setting up or using a Cloudflare Origin Certi...

Fixing Nginx 502 Bad Gateway in Docker Networks

You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...

How to Create a package.json for Your npm Project

If you're starting a Node.js project, you'll need a package.json file. This ...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

When you run git clone, git pull, or git fetch over HTTPS,...

Fix Nginx Upstream Connection Refused Socket Error