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infrastructure/from-localhost-to-production-what-deploying-your-code-really-means.md
From localhost to production: what “deploying” your code really means
Your app runs perfectly at localhost:3000, but the link does nothing on a friend's phone. That's because localhost means "this computer"…
tools/git-basics-where-your-work-lives-and-why-branches-are-just-pointers.md
Git Basics: Where Your Work Lives and Why Branches Are Just Pointers
Git saves your project's history as commits: snapshots you choose to take, each with a short message. The trick to understanding it is…
computers/counting-with-only-0-and-1-how-computers-store-numbers-and-letters.md
Counting with Only 0 and 1: How Computers Store Numbers and Letters
Every photo, message and web page on your computer is stored as numbers written with just two digits: 0 and 1. That's binary, and it works…