You want start rails using docker, following command is enough.
$cd rails_broken_app
$docker-compose up -d
than use a browser to access localhost:3000
You'll see rails_broken_app page.
Rails_Broken_App has some vulnerabiliy.Use various techniques to find the vulnerability.
Reveiw => SUBMIT
source-sink
/app/views/review/_list.html.erb
products => Purchase
source-sink
/app/controllers/cart_controller.rb
Reveiw => SUBMIT
source-sink
/app/controllers/review_controller.rb
Login => Login
source-sink
/app/controllers/User/sessions_controller.rb```