Host secrets
This folder contains host-specific settings, typically the IP address of a VPS.
IP Secret Management
Define some common host configuration options in /modules/base/hosts.nix and declare them centrally in /hosts/general.nix. In /modules/base/users.nix, store IP-related secrets in files and import them into knownHosts; in /modules/nixos/base/networking.nix, store IP-related secrets in systemd’s drop-in.