init: macmini nixos configuration.

modules/services/ddns-go.nix

@@ -0,0 +1,38 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    ddns-go
+  ];
+
+  systemd.services.ddns-go = {
+    description = "DDNS-Go";
+    after = [ "network.target" ];
+    wantedBy = [ "multi-user.target" ];
+
+    serviceConfig = {
+      Type = "simple";
+      ExecStart = "${pkgs.ddns-go}/bin/ddns-go -l [::]:9876 -f 300";
+      Restart = "always";
+      RestartSec = 3;
+      User = "ddns-go";
+      Group = "ddns-go";
+
+      StateDirectory = "ddns-go";
+      Environment = "HOME=/var/lib/ddns-go";
+
+      NoNewPrivileges = true;
+      PrivateTmp = true;
+      ProtectSystem = "strict";
+      ReadWritePaths = "/var/lib/ddns-go";
+    };
+  };
+
+  users.users.ddns-go = {
+    isSystemUser = true;
+    group = "ddns-go";
+    home = "/var/lib/ddns-go";
+    createHome = true;
+  };
+  users.groups.ddns-go = { };
+}