Update readme (#36)

README.md

@@ -177,6 +177,10 @@ After checking out the repo, run `bin/setup` to install dependencies. Then, run
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
 
+**NOTE** If you have not previously signed in to Rubygems, you'll be prompted to:
+* create and/or sign in to your account via your terminal
+* (if you aren't already an owner) have an owner add you with `gem owner breakers --add <your_email@email.com>`
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/department-of-veterans-affairs/breakers.