Change hostname to chromatic-aberration, enable SSH

Since it's a Chromebox and that name sounds vaguely cool I guess

configuration.nix

@@ -32,7 +32,7 @@
   };
 
   networking = {
-    hostName = "nixos";
+    hostName = "chromatic-aberration";
     networkmanager.enable = true;
   };
 
@@ -42,12 +42,22 @@
       enable = true;
       wayland.enable = true;
     };
+    openssh = {
+      enable = true;
+      settings = {
+        PasswordAuthentication = false;
+        PermitRootLogin = "no";
+      };
+    };
   };
 
   users.users.sipb = {
     isNormalUser = true;
     extraGroups = [ "wheel" ];
     shell = pkgs.fish;
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPDLPakDnAelqFTUudQB8X0T7yc/8ekV3jGqpeJb062l anthonywang"
+    ];
   };
 
   programs = {