move clien to here
modify access path
update html view
use category.name
use category.name
update data in mysql
modify categoryAdd
delete console.log
delete console.log
delete console.log
update modifyItem function
modify html view
modify html views
finish itemAdd controller
finish category service
finish item service
finish itemModify controller
rename cartItem.number to cartItem.num
can post new cartItem
delete console.log