next questions:
1. is there any "lightweight" Bitcoin client I can use for Lightning?
I know about Neutrino
https://github.com/lightninglabs/neutrino, but they dont recommend use their client in mainnet
Neutrino is an experimental Bitcoin light client written in Go and designed with mobile Lightning Network clients in mind. It uses a new proposal for compact block filters to minimize bandwidth and storage use on the client side, while attempting to preserve privacy and minimize processor load on full nodes serving light clients.
There are multiple known major issues with the client, so it is not recommended to use it with real money at this point.
2. How can I move my Lightning Node to another server/ip address? How can I save all channels and peers after move?