Static site in heroku

commands

git init
git add .
git commit -m "Initial"
heroku create <APP>
heroku addons:add custom_domains
heroku domains:add <APP>.com
heroku domains:add www.<APP>.com
git push heroku master

config.ru

use Rack::Static, :urls => ["/stylesheets", "/images"], :root => "public"
run lambda { |env| [200, { 'Content-Type' => 'text/html', 'Cache-Control' => 'public, max-age=86400' }, File.open('public/index.html', File::RDONLY)]}