Updated the lnbits.nix configuration to import the LNBits service module from a flake, improving maintainability and alignment with deployment practices. Adjusted the shared configuration to make the 'domain' parameter accessible to all imported modules, and removed the deprecated lnbits-service.nix file to streamline the setup.
Introduced a new configuration for the LNBits service, enabling it with customizable options such as host, port, and environment variables. The Nginx configuration has been updated to include WebSocket support and proxy settings for LNBits, ensuring secure and efficient handling of requests. This enhances the overall web service management and modularity of the NixOS setup.
