[FEATURE] Add production error tracking

[awpala]

Is your feature request related to a problem? Please describe.
Run-time errors should be logged and diagnosed/fixed accordingly.

Describe the solution you'd like
Use a service (e.g., Sentry or similar) to log/track run-time errors and other anomalies in production environment. Conversely, Firebase SDK may possibly provide such a service already. This will require some spiking/investigation to implement.

Describe alternatives you've considered
(N/A)

Additional context
(N/A)

[awpala]

N.B. Adjacently related to Issue #12 , however, the scope of that issue was more specific to the now-deprecated Go backend app/repo. We should revisit this in the context of the (Firebase-oriented) MVP in the (post-)rollout phase of the site.