brew install watch
To install the watch command line tool. I also customized the appointments.sh to point to the correct path of the cvc.js file. Then I got the list of vaccine centers in json and customized the appointments.sh to include the ids of my nearest vaccine centers.
Finally I also customized the cvc.js file to filter by a later date. For me it is 2021-04-01 because I was trying to find a jab sooner.
Thanks Nathan for releasing the script.