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

Fix Nginx Upstream Connection Refused & Upstream Not Found

When you see upstream connection refused or upstream not found in your ...

Git Merge Unrelated Histories Without Losing Commits

You've cloned a repo, added a new remote, and now you need to merge two branches that don'...

docker compose set environment variable from file

When running Docker Compose, you often need to pass environment variables to your services. Hardc...

How to Fix Git Merge Conflict Permission Denied Errors

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 Python UnicodeDecodeError When Reading UTF-16 Files

You open a file in Python and get UnicodeDecodeError: 'utf-8' codec can't decod...