Thin is a super-cool Rack app server written in Ruby. Normally you’ll run it behind a Webserver like Apache or Nginx. It’s great and I use it for most of my Rails and Sinatra Web apps. But my goals isn’t to convert you (like I was converted from Passenger). My goals is to tell you how to use it effectively in production. Thin has plenty of docs with commands like thin start -p 3001 -e production —