Set the LNBITS_API_KEY instead of the Zebedee api key. In the settings.yaml file set the paymentsProcessors.lnbits.baseUrl to the base URL of your LNbits instance.

I don’t know how to get the api key nor the base URL nor how to set up LNbits in the first place. 😅

The rest of the steps of the Zebedee guide should probably work as well.