Do not worry, there are no spoilers nor the exercise has been started.
For anyone trying to run this project in 2022 and you find it outdated, with a deprecated react-router-dom config, I made a boilerplate on my github. This is the project ready to start, with the fixes provided to make it compatible with react-router-dom v6 onwards, so you can start this exercise without having to do the same i just did.
You can download that, fork it, or whatever. The readme has a short explanation for getting started and troubleshooting.