Workflow manuals for setup steps, repeatable tasks, and software operations.

docker compose set environment variable from file

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

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Setting Up Cloudflare Wildcard Subdomains for Multiple Sites

If you manage multiple sites or services on different subdomains (like app.example.com, blog.exam...

How to Fix Git Unrelated Histories Error When Merging Branches

You try to merge two branches, and Git stops with: fatal: refusing to merge unrelated histo...