Turn a project directory into a repository
git init creates the hidden .git directory that contains the repository's metadata, object database and references. Your normal project files remain in the working directory.
Understand the three areas
Git work is easiest to understand as three areas: the working tree contains your current files, the staging area contains the exact changes selected for the next commit, and the repository contains committed history.
After initialization, Git does not automatically commit every file. You decide which changes belong in the next snapshot by staging them.
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