rack server with sprockets and less compressor

config.ru

#Rack server default at 0.0.0.0:9292

require 'sprockets'
require "sprockets-less"
require "less"

project_root = File.expand_path(File.dirname(__FILE__))
assets = Sprockets::Environment.new(project_root) do |env|
    env.logger = Logger.new(STDOUT)
end

assets.append_path('app/assets/stylesheets/')

map "/assets" do
    run assets
end

map "/" do
  run lambda { |env|
          [
            200,
            {
              'Content-Type'  => 'text/html',
              'Cache-Control' => 'public, max-age=86400'
            },
            File.open('public/index.html', File::RDONLY)
          ]
  }
end

Gemfile

source 'https://rubygems.org'
gem "sprockets"
gem "sprockets-less"
gem "less"
gem 'therubyracer'


#This file is created to easily install all required gems at once with dependencies