It's a Rails 4.1.8 app.
Make sure you're running Ruby 2.1.5 (there's a .ruby-version file that should be read by rvm or rbenv) and then:
bundle
bundle exec rake db:create db:migrate
bundle exec rails server
Open on http://localhost:3000
Foundation Docs/Ver https://foundation.zurb.com/sites/docs/v/5.5.3/