new nixos dotfile layout

Signed-off-by: Michał Czyż <mike@c2yz.com>

hosts/modules/ssh.nix

@@ -0,0 +1,13 @@
+{
+  networking.firewall.allowedTCPPorts = [ 22 ];
+
+  services.openssh = {
+    enable = true;
+    ports = [ 22 ];
+
+    settings = {
+      PasswordAuthentication = true;
+      UseDns = true;
+    };
+  };
+}