Created a function to publish product code, price, and quantity to the kafka message broker for the order microservice to receive the message and update the shopping cart table with new quantity or price

Update - implemented the event driven architecture with kafka event store and streaming service for asynchronous communication between the product and user microservice

First commit for product microservice. It consists of 3 pages and 4 functions: The firt function displays products by category on the home page. The second function displays a product on another page after it has been clicked on. It displays the product name, price, image, description and reviews and the product id is sent through a get request. The third function communicates with the user microservice to get a users username when they want to add a product. And the fourth function inserts the product reviews and username gotten from the user microservice into the product reviews table