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
 - 
Configuration
 - 
Database creation
 - 
Database initialization
 - 
How to run the test suite
 - 
Services (job queues, cache servers, search engines, etc.)
 - 
Deployment instructions
 - 
…
 
Please feel free to use a different markup language if you do not plan to run rake doc:app.