This project populates a Heroku Postgres database with demo data. Once populated with data, you can then use Heroku Connect to share this data via a Heroku External Object to Salesforce.
use existing plugin code [either running on the heroku app or via scheduled github action] to modify the dates in csv files (walking them forward based on a relative date) so data remains fresh/timely
this process should be executable via heroku scheduler, too.