Does this have to be installed on the same machine as the node?
No it doesn't. It can be installed on any machine but it has to be able to connect to the node in question in order to get the invoice. I'll put together a guide but no guarantees I won't make a mistake somewhere. If you'd like to try mine out I can dm you the url. It's got several domains to choose from.
Yeah I would like to try it out. Thanks.
Sent 🤙