reach the folder "api" which includes "db.json"
db.json is the file which contains products and categories we need for app the work properly

cd api
npm install json-server
npx json-server --watch db.json

It's a react project, so you need "react" to examine it
Start the app after you installed requirements by simply running the code below
Ensure that you are in the folder including "package.json" file

npm install
npm start