Add in some description of how to get started

[mikegehard]

As a complete beginner, there is a huge gap between bundle install, getting my first test green and then getting into a rhythm around using tests as an educational tool if this repo is to be used stand alone.

Once learned, that rhythm is a powerful aid to a student.

Is there a way to add the steps for this rhythm into the root level README or maybe the strings README so that the student at least knows what commands to run?

[tvaroglu]

Ditto to Mike's comment... it took quite a bit of research to get the first spec.rb file to run, but was able to determine the correct commands and was ultimately able to move forward with completing the exercises.

[gjcarew]

I'd like to suggest as a solution adding this to the readme to structure the practice: https://josh.works/turing-backend-prep-01-intro