puma-port.log

➜  puma-demo cat config/puma.rb | grep port
# Specifies the `port` that Puma will listen on to receive requests, default is 3000.
port        ENV.fetch("PORT") { 3100 }
# Workers do not work on JRuby or Windows (both of which do not support
➜  puma-demo spring stop
Spring is not running
➜  puma-demo bundle exec rails s
=> Booting Puma
=> Rails 5.0.0.beta3 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.2.0 (ruby 2.3.0-p0), codename: Spring Is A Heliocentric Viewpoint
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Use Ctrl-C to stop