Software comparisons, alternatives, and tool decision notes.

Cloudflare Wildcard Subdomain Cache Not Working: Fixes

If you use a wildcard DNS record like *.example.com proxied through Cloudflare, you ...

Docker Compose Environment Variable from Shell Not Working: Fixes

You set an environment variable in your shell, but Docker Compose ignores it. This is a common pi...

Git Detached HEAD: Practical Checklist and Fixes

You see a message like 'You are in 'detached HEAD' state' when checking out a com...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

You run git clone https://example.com/repo.git and get:

fatal: unable to acc...

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...

Git Merge Conflict: How to See the Diff Between Versions

When you run git merge and hit a conflict, Git pauses and marks the conflicting file...