GET /api/products: Return an array of products stored in database.

{
      id: 1,
      title:
        "The Lean Startup: How Constant Innovation Creates Radically Successful Businesses Paperback",
      price: "11.96",
      rating: 5,
      img_link:
        "https://images-na.ssl-images-amazon.com/images/I/51Zymoq7UnL._SX325_BO1,204,203,200_.jpg",
      date_published: "2021-01-29T17:19:49.000Z",
}

GET /cart/items: Return an array of item in the cart.

{
      item_id: 1,
      product_id: 1,
      title:
        "The Lean Startup: How Constant Innovation Creates Radically Successful Businesses Paperback",
      price: "11.96",
      rating: 5,
      img_link:
        "https://images-na.ssl-images-amazon.com/images/I/51Zymoq7UnL._SX325_BO1,204,203,200_.jpg",
    }

POST /cart: post an item to the cart table

{ item_id: 1, product_id: 1 }

POST /auth/login: post the user credentials for verification.

DELETE /cart/items/:item_id: allow user to remove the item in the cart