nostr:nprofile1qqsyv47lazt9h6ycp2fsw270khje5egjgsrdkrupjg27u796g7f5k0spremhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet59uq3vgrhwden5te0wfjkccte9ejxzmt4wvhxjme0e0qnc2 is it possible to add a custom lightning domain?