Clone the repository into your own folder and copy the config/initializers/carrierwave.rb.sample file to config/initializers/carrierwave.rb and fill it with your information.
Deploying (to Heroku)
Change into the directory you cloned Taskrey into. Run
heroku create git push heroku master heroku rake db:migrate
Go to your application (on heroku, or wherever you deployed it) and sign up. The first user is setup as the admin user.
Keeping up to date
Go to your application directory and just issue a pull and push to heroku (or wherever you deployed to):
git pull git push heroku master herou rake db:migrate