bundle init

vim Gemfile

# coding: utf-8
source "http://rubygems.org"

# sinatra本体と便利なプラグイン
gem "sinatra", require: "sinatra/base"
gem "sinatra-contrib", require: "sinatra/contrib/all"


# nodejsインストールしていない環境では必要
gem "execjs"
gem "therubyracer"

# 三種の神器
gem "haml"
gem "sass"
gem "coffee-script"

bundle install --path vendor/bundle

vim config.ru

require 'bundler'
Bundler.require

require './app'

run App

vim app.rb

class App < Sinatra::Base
  register Sinatra::Reloader

  get '/' do
    'Hello World'
  end
end

bundle exec rackup -p 3000 -o sample.com

unicorn -D