Should we put a LICENSE file in the Rails top level project directory?

Should we put a LICENSE file in the Rails top level project directory to define our license. It seems to be done in some open source projects.

Found these references: http://dev.rubyonrails.org/browser/trunk/railties/MIT-LICENSE (this link in broken) Ruby on Rails — Pick a license for your Rails additions rails-i18n/MIT-LICENSE.txt at master · svenfuchs/rails-i18n · GitHub (example) The MIT License | Open Source Initiative

Each component of Rails has its own copy of license file since they are packaged separately. https://github.com/rails/rails/blob/master/railties/MIT-LICENSE

Yes, I found it later in the day. Sorry I did not look earlier. Thanks.