2 . third-level domain support
config.action_dispatch.tld_length = 2 to development.rb
see rails api(
url_for :tld_length option )
3 . set domain key in session_store.rb to keep session
redirecting from domain.com to sub.domain.com will lose session unless you set domain option in session_store.rb.
Vfolio::Application.config.session_store :cookie_store, key: '_vfolio_session', domain: '.xxxxx.ekohe.com'
the default session_store.rb generated by rails has no domain option, and set domain option to domain: :all is a trap
4 . use lvh.me test subdomain locally(https://coderwall.com/p/bggmvq) or use dnsmasq to set your dns
secret_token.rb should be created as link in deploy.rb, replace secret token when deploying