$ docker build -t my-ruby-app .
$ docker run -it --name my-running-script my-ruby-app

You should see the cucumber tests pass

• Install ruby 2.5. The suggested way to install ruby locally on your system is via rbenv.
• Once you have ruby in your path, install bundler with gem install bundler
• Run bundle install in this directory
• Run the cucumber tests using the bundle exec cucumber command