[garysieling]

Are there any well-tested Node.js libraries to do scheduling alongside something this? E.g., if I wanted to send the notifications once a week, etc.

[ezekg]

I've used https://github.com/kelektiv/node-cron in the past, which could be run in the same process as the web app or in its own process. Works really well for recurring jobs.

[bdav24]

Yes thanks, using something like node-cron can resolve your problem.