Yeah, this is a good point that actually been coming up recently. We’re not going to change it in the tutorial, but we could add a callout as well as a “Where to go from here:” section at the end, which might recommend setting up Postgres locally as well as trying a Cookbook doc.
[Edit: Rob does mention setting up postgres for local deployment with a link to the doc. And I just created an Issue about improving the “Wrapping Up” final section of the Tutorial with some specific next steps.]