sinatra-test

config.ru

require 'rubygems'
require 'bundler'

Bundler.require

require './test_app'
run Sinatra::Application

config.yml

msg: hello, world!

Gemfile

gem "sinatra", :require => "sinatra/base"
gem "sinatra-contrib"

test_app.rb

require 'sinatra'
require 'sinatra/config_file'

config_file 'config.yml'

get '/' do
  "#{settings.msg}"
end