yarn install
yarn start

Display a component ProductItem which will contain some very small sub components (ie Price, AddToCartButton...)

Display a list of ProductItem with all the needed data passed as react props ; the data can be imported from mockup/ (and mockup data can be extended if needed)

Add a basket/cart component

Use Redux to add products to basket.

Use React-Router (along with Redux) and add a ProductPage route. When you click on a button on productItem, you go to this page. You can then go back to the product list.

Use Apollo and a very simple GraphQL server to fetch the product data

Propose a way of adding dynamic modals and/or alerts to the page. You can add a "stock" notion to the GraphQL data set, and decrease it when a user adds a product. When there is no stock, the product is still displayed, maybe a bit differently, but when you click on the "add" button, it would also display a nice modal.