hosts: move to new structure

Signed-off-by: unexplrd <unexplrd@linerds.us>

hosts/eldrid/nix/ssh-serve.nix

@@ -0,0 +1,10 @@
+{config, ...}: let
+  inherit (builtins) readFile;
+  inherit (config.users.users) user;
+in {
+  nix.sshServe = {
+    enable = true;
+    write = true;
+    keys = map (f: readFile f) user.openssh.authorizedKeys.keyFiles;
+  };
+}