Once you've created an account and started a blank project that clones this repository, do the following:
Install Ruby 2.4.2 by typing the following into the terminal at the bottom:
rvm install ruby-2.4.2
Then use that version by typing:
rvm use 2.4.2
Install bundler:
gem install bundler
Install the gems this Rails app depends on:
bundle install
Start Postgres on your virtual server by typing into the terminal:
sudo service postgresql start
Then to create the database, where Rails will store your data, type:
bundle exec rails db:create
Type the following into the terminal to run Rails on Cloud9:
rails server -b $IP -p $PORT
Visit projectname-username.c9users.io
to see your new web app for the first time.