slackbuilds-current/ruby/passenger/README

Phusion Passenger is a web server and application server, designed to
be fast, robust and lightweight. It takes a lot of complexity out of
deploying web apps, adds powerful enterprise-grade features that are
useful in production, and makes administration much easier and less
complex.

Phusion Passenger supports Ruby, Python and Node.js.

node is an optional dependency (autodetected).