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
-
...
I have never build an app in my life and I have no idea what this first app of mine is gonna be.