Add project files.

TestClient/Program.cs

@@ -0,0 +1,34 @@
+using Microsoft.AspNetCore.SignalR.Client;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Websocket.Client;
+
+
+var builder = new HubConnectionBuilder()
+    .WithUrl("https://api.gastrojames.ch/hubs/internal?access_token=https://api.gastrojames.ch/hubs/internal") // Replace with your SignalR hub URL
+    .WithAutomaticReconnect()
+    ;
+;
+
+var connection = builder.Build();
+
+await connection.StartAsync();
+string groupName = "67e534f8e86e816689323023"; // Replace with your actual group name
+await connection.InvokeAsync("JoinGroup", groupName);
+
+connection.On<PrintJob>("PrintJob", (args) =>
+{
+    Console.WriteLine($"Received print job for working area: {JsonSerializer.Serialize(args)}");
+
+});
+
+Console.ReadLine();
+
+public class PrintJob
+{
+    [JsonPropertyName("workingAreaId")]
+    public string WorkingAreaId { get; set; }
+    [JsonPropertyName("content")]
+    public string Content { get; set; }
+}