URGENT: we need to add a cloud function for updating the algolia databse

[skamansam]

We need to start with security in mind. Therefore, we need to limit access to algolia to allow only reading. In orer to do this, we need to create a cloud function that updates on data changes.

To setup local testing:
https://firebase.google.com/docs/functions/local-emulator

[skamansam]

We decided on just having the frontend update the DB. We should revisit this later. IMO, this could cause dumps into algolia, polluting the data. Such is the way for crowd-sourced data, though.