Most Ideal Way to Run a Scheduled Job with Angular-Meteor

I'm writing an appointment scheduling app with angular-meteor. One of the requirements is that a text notification be sent out to the customer who made the appointment. The customer provides a cell number. But basically, all I want to do is send out an email X many minutes before the appointment time. Running off the angular-meteor stack, what might be the best way to do this? All of the appointment information is saved to a mongo db.

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