Added NixOS module

nix/qddns-module.nix

@@ -30,17 +30,17 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    systemd.sockets.qddns = {
+    systemd.sockets.qddns-server = {
       enable = true;
       listenStreams = [ "/run/qddns.sock" ];
+      wantedBy = [ "multi-user.target" ];
       socketConfig = {
         SocketUser = cfg.sockUser;
       };
     };
-    systemd.services.qddns = {
+    systemd.services.qddns-server = {
       enable = true;
       script = "${pkg}/bin/qddns-server";
-      wantedBy = [ "multi-user.target" ];
       environment.QDDNS_SERVER = cfg.db;
       serviceConfig = {
         DynamicUser="yes";