network: enable firewall

modules/system/networking.nix

@@ -4,7 +4,15 @@
 
   networking = {
     hostName = "macmini";
-    firewall.enable = false;
     networkmanager.enable = true;
   };
+
+  networking.firewall = {
+    enable = true;
+    allowPing = true;
+    allowedTCPPorts = [
+      22
+      8443
+    ];
+  };
 }

modules/system/nix.nix

@@ -8,6 +8,6 @@
     enable = true;
     clean.enable = true;
     clean.extraArgs = "--keep-since 4d --keep 3";
-    flake = "/home/user/my-nixos-config"; # sets NH_OS_FLAKE variable for you
+    flake = "/home/sky/nixos/";
   };
 }