feat: create basic server side application
chore: extend script for serving dev and dist release
fix(grunt): configure proxies for e2e/integration specs
feat(tests): script for running test api server in the background
feat: extend server side application
feat: simple script for running backend and frontend servers
feat: create Products resource

work in progress
chore(tests): extend specs for routes
chore(tests): add specs for Products#hasDiscount
chore(tests): add specs for Products#priceWithDiscount