add ssh server to polaris

modules/hosts/polaris/default.nix

@@ -37,6 +37,7 @@ in
     {
       imports = [
         nixosModules.workstation-base
+        nixosModules.openssh
         nixosModules.steam
         ./_hardware.nix
       ]
@@ -46,5 +47,10 @@ in
         common-cpu-amd
         common-gpu-amd
       ]);
+
+      services.openssh.openFirewall = false;
+      networking.firewall.extraInputRules = ''
+        ip saddr 192.168.178.0/24 tcp dport 22 accept
+      '';
     };
 }