add router.put in category.js
add )
update categories.js
update getItem function
add router.delete in items.js
add get by id
add router.put in items.js
add router.post in items.js
add require lodash
add POST api/cartItems/payment
format code
delete console.log()
update items.js
add reduce cart items quantity function
update reduce function
change put to post
add POST api/cartItems/plus
update plus function
update reduce function
delete unuseful codes