Whenever you deploy using Capistrano, a new folder is created within the releases directory on the remote server containing the application code.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

Read more Show archive.org snapshot

By default Capistrano 3 keeps the last 5 releases in case you need to rollback to an older release. You can overwrite this setting by using

set :keep_releases, 3