установить rvm bundle установить редис rake db:seed rails s
curl -i -H "Accept: application/json" "localhost:3000/api/products"
curl --header "Content-Type: application/json" \
--request POST \
--data '{"product_id":"1","quantity":"1"}' \
http://localhost:3000/api/cart
curl -i -H "Accept: application/json" "localhost:3000/api/cart"