Deploy

Phusion Passenger = web application server.

1. handles HTTP requests

2. manages processes and resources

3. enables administration, monitoring and problem

https://www.phusionpassenger.com/library/walkthroughs/basics/ruby/fundamental_concepts.html

https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/nginx/oss/yakkety/install_passenger.html