Please refer to the first chapter in the book for instructions on setting up your environment with Node & npm.
You can install all the packages for all the projects up front, saving you time in the future. To do so, from this directory:
npm i
npm run install-all
Unless you have a quantum computer connected directly to an Amazon data center, this task will take a long time to complete.
See the respective README.md for each project.
PS: I'm sharing the code on a non-profit purpose. If you want to buy the book, here is the link: https://www.fullstackreact.com