This README would normally document whatever steps are necessary to get the application up and running.
Things you may want to cover:
- 
Ruby version 
- 
System dependencies 
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Configuration 
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Database creation 
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Database initialization 
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How to run the test suite 
- 
Services (job queues, cache servers, search engines, etc.) 
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Deployment instructions 
- 
… 
Please feel free to use a different markup language if you do not plan to run rake doc:app.