Keep in mind that this is not officially maintained but will be regularly updated.

If you need to manage multiple servers but don't want the headache of trying to do it all through CLI, Pterodactyl is a great way to get around all that.

This is what is referred to as an "egg". You can import it into your Pterodactyl panel and create/manage as many servers as you need/want.

No license. You are free to do as you please with the file to suit your needs.

GitHub repo