Regarding this tutorial "Connect a local parachain": https://docs.substrate.io/tutorials/connect-other-chains/local-parachain/, it requires
- using GUI in a browser to Reserve a ParaID on the relay chain (that is to use Polkadot-JS Apps connecting to your local relay chain)
I have searched on that Polkadot-launch repo https://github.com/paritytech/polkadot-launch/ and found nothing about that.
How can I use a command line(e.g. NodeJs) to do that?