Setting Up Rails
In a book titled Rails Scales!, the most basic and essential block is, you guessed it, Ruby on Rails. It is important for you to use exactly the same version of Rails as the one we will use in the book. Of course, the general lessons of this book should be applicable to any Rails version (or even any web application!), but if you want to avoid the trouble of dealing with breaking changes in Rails, stay with the recommended version.
As was the case with Ruby, this book runs a fairly new version of Rails, which right now means the latest Rails 8.0.x. In any case, to manage the Rails—and all the other Ruby libraries—you have bundler. If you are a Ruby software engineer you totally know what I am talking about, but if not, here ...
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