If you're making any project of sufficient complexity, you'll need a
publish/subscribe
[https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern] server to
process events. This article will introduce you to Postgres, explain the
alternatives, and walk you through an example use case of pub/sub and its
solution.

Postgres is an amazing relational database

If you aren't too familiar with Postgres, it's a feature-packed relational
database that many companies use as a traditional central d