Dear Sara, dear readers,
FYI: The link to the node red installation seems to be broken:

pi@raspberry:~ $ bash <(curl -sL https://raw.githubusercontent.com/node- red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)

I found that ling in the ‘Learn_ESP32″ book on page 386 and the same link is also on:

https://randomnerdtutorials.com/getting-started-node-red-raspberry-pi/

Would be great, if someone could update the link if time allows.

Happy hackin’