Caregiver notifications (MVP)

[brylie]

We would like to send reminder notifications to caregivers so they remember the tasks they have agreed to take. These notifications can be:

• email
• text message
• mobile-app notification
• a combination of the above

Task

• [ ] determine which type(s) of notifications to support initially
• [ ] research how to implement the related notifications using Django and other related services
• [ ] document the desired design
• [ ] indicate which notification type(s) might be added later in the roadmap by creating relevant GitHub issue(s)
• [ ] implement the initial notifications