It's Rails version of Flask Python Backend Challenge https://github.com/stepin/python-challenge . Just to see how it will be different in another language and framework.
brew install rbenv
rbenv init
#manual steps described in rbenv init
rbenv install 2.6.1
rbenv global 2.6.1
gem install rails
rbenv rehash
bundle
bundle exec rake db:create db:seed
bundle exec rails server