See [Box 1.4](http://draft.railstutorial.org/book/beginning#aside-github_bitbucket http://draft.railstutorial.org/book/beginning#aside-github_b...). The tl;dr i

See [Box 1.4](http://draft.railstutorial.org/book/beginning#aside-github_bitbucket http://draft.railstutorial.org/book/beginning#aside-github_b...). The tl;dr is that Bitbucket is free for private repos, which for security purposes the new edition uses by default.