Ruby Tutorial - Hello World from Sinatra

ruby-hello-world-sinatra.rb

require 'sinatra'

# Listen on all interfaces in the development environment
# This is needed when we run from Cloud 9 environment
# source: https://gist.github.com/jhabdas/5945768
set :bind, '0.0.0.0'
set :port, 8080

get '/' do
    'hello world!'
end