introduce arrow host and deployment

hosts/swan/default.nix

@@ -109,8 +109,9 @@ inputs.nixpkgs.lib.nixosSystem {
       };
 
       # Disable passwords, only use SSH key
-      publicKey =
-        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB+AbmjGEwITk5CK9y7+Rg27Fokgj9QEjgc9wST6MA3s";
+      publicKeys = [
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB+AbmjGEwITk5CK9y7+Rg27Fokgj9QEjgc9wST6MA3s personal"
+      ];
     }
   ];
 }