production:
  primary:
    host: prod-db-primary.example.com
    port: 5432
    username: prod_user
  replica:
    host: prod-db-replica.example.com
    port: 5432

staging:
  primary:
    host: staging-db.example.com
    port: 5432
    username: staging_user

development:
  primary:
    host: localhost
    port: 5432
    username: dev_user