This beautiful tweet by Dan Abramov brought to life.

1. Create a Vercel Postgres database and link it to your project
2. Go to its settings and copy the psql command
3. Add -f sql/init.sql like so to populate the database with some data:

   psql "postgres:https://{user}:{password}@{name}.{location}.postgres.vercel-storage.com:5432/verceldb" -f init.sql