Don't forget to run:

npm install
npm start # to run the app

Also, you need to have a .env file in the root dir for all the environment variables and a ./my-uploads dir for the images:

PORT=your port # you can leave this by default is 3000

MONGO_ATLES_URL=your mongo atles url

SECRET=secretOrPublicKey # can be any string

I have also added my postman collection for this project: ./First Node Project.json