Added the Shopping Cart App Idea.

Projects/1-Beginner/Shopping-Cart.md

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+# Shopping Cart
+
+**Tier:** 1-Beginner
+
+It will be a good thing to have a practice project in order to add pre-available items to a simple shopping cart. This will provide a solid foundation to the CRUD implementation on a very basic level.
+
+This challenge requires that the developer implementing it follow these constraints:
+
+-   The button 'Check Out' should remain disabled until there is no item in the shopping cart.
+-   The user cannot add items in a negative manner. For example the items cannot be less than zero in any case.
+
+### User Stories
+
+-   [] User should be able to filter the items using a Search Box.
+-   [] User should be able to add the item into the shopping cart by clicking on the 'Add to Cart' or '+' Button.
+-   [] User should not be able to decrease any item less than 0.
+-   [] When there are atleast 1 item in the cart the Checkout button will be enabled.
+
+### Bonus Feature
+-   [] User can manually input the number of item in the cart.
+
+## Useful Links and Resources
+[A Simple Shopping Cart with HTML and CSS](https://www.w3schools.com/howto/howto_css_product_card.asp)
+
+## Example Projects
+-   [Simple Shopping Cart](https://www.w3schools.com/howto/howto_css_product_card.asp)