This task was build using lumen 5.8 (laravel micro framework)

Steps to run The project

git clone of the master branch
run composer install
renaming .env.example to .env with the connections according to the environment.
run php artisan migrate
run php artisan db:seed (to fill data to customers and items tables)
run php -S localhost:8000

Endpoints

get all store items Pagination (http://localhost:8000/api/items?page=1)
add or update an item to customer cart with the quantity, ex: increase and decrease item's quantity at the cart (http://localhost:8000/api/cart/addOrUpdateItem)
remove an item of customer cart (http://localhost:8000/api/cart/removeItem)
get customer cart selected item's checkout (http://localhost:8000/api/cart/checkout/1)
get total price of the purchase items (http://localhost:8000/api/order/TotalPurchase/1)
make an order and check for store credit, update it and reset customer cart(http://localhost:8000/api/order/make)

The Lumen framework is open-sourced software licensed under the MIT license.