What is the proper way to set up Capistrano to deploy a Rails app to multiple environments with different permissions required for each environment? In other words, imagine a typical scenario where a developer makes changes to code and pushes the changes to a testing environment. After testing, a release manager pushes the changes to production. And so on, with possible additional levels in between. Capistrano (even with the multistage extension in capistrano-ext) seems to be built for a single user having permissions to deploy to any environment. What is the recommended setup for cases where people at the bottom level shouldn't be able to deploy all the way to production?