fix(nixos): avoid blocking guest startup on steamcmd

configs/nixos/modules/services/steamcmd.nix

@@ -65,6 +65,13 @@
       default = [ ];
       description = "TCP ports opened for the game service.";
     };
+
+    startupTimeout = lib.mkOption {
+      type = lib.types.str;
+      default = "15min";
+      example = "30min";
+      description = "Time systemd allows SteamCMD update and server startup to complete.";
+    };
   };
 
   config = lib.mkMerge [
@@ -138,12 +145,14 @@
               WorkingDirectory = "-${service.steamDir}";
               ExecStartPre = "+${prepareScript}";
               ExecStart = updateScript;
+              TimeoutStartSec = service.startupTimeout;
             };
           };
 
           ${service.serviceName} = {
             description = "${service.serviceName} game server";
             after = [
+              "multi-user.target"
               "network-online.target"
               "steamcmd-${service.serviceName}-update.service"
             ];
@@ -160,6 +169,7 @@
               ];
               ExecStart = startScript;
               Restart = "on-failure";
+              TimeoutStartSec = service.startupTimeout;
             };
           };
         };