I would like to create a javascript document for the cart to manage and refine the checkout of a resturant website. $//$ CartItem component representing each item

in the cart

const CartItem fcartItem, removeFromCart,

updateQuantity The frontend logic has been implemented, focusing on cart management, and your expertise is crucial in optimizing the checkout flow.Key areas requiring attention include the checkout logic, precise total updating, and ensuring a seamless order placement experience. Collaboration is sought to discuss and implement improvements. use node js and express js and give the answer in a form of a code see the frontend attached kindly stick to variable names for the backend and make sure that it runs and is robust. Make sure calculations in the cart is correct. THANK U comment the code as much a possible and use javadoc