rewrite firewall config

nixos/configuration.nix

@@ -90,10 +90,6 @@
     ];
   };
 
-  users.users.root.openssh.authorizedKeys.keys = [
-    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICNkZ5Xr75thR/tEgsASzYAtaA/kbsv2PKI8ux9rgpTe roydumblauskas@gmail.com"
-  ];  
-
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [
@@ -119,7 +115,11 @@
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
-  networking.firewall.enable = false;
+  # networking.firewall.enable = false;
+  networking.firewall = {
+    enable = true;
+    allowedTCPPorts = [ 22 80 443 ];
+  };
 
   # Copy the NixOS configuration file and link it from the resulting system
   # (/run/current-system/configuration.nix). This is useful in case you