Fix authentication during setup
Add $POSTGRES_USER to unix socket access (as $POSTGRES_USER will not be a real unix user, peer auth will not work), and ensure that the scripts are only run when the database is created by the user.
Add $POSTGRES_USER to unix socket access (as $POSTGRES_USER will not be a real unix user, peer auth will not work), and ensure that the scripts are only run when the database is created by the user.