trellis and invokeAI urls configurable in config

Assets/_PROJECT/Scripts/ModeGeneration/TrellisClient.cs

@@ -9,16 +9,16 @@ public class TrellisClient : MonoBehaviour
 {
     public static TrellisClient Instance { get; private set; }
 
-    public string TRELLIS_BASE_URL;
-
     private HttpClient httpClient;
 
     private void Awake()
     {
         httpClient = new HttpClient();
-        httpClient.BaseAddress = new Uri(TRELLIS_BASE_URL);
+        httpClient.BaseAddress = new Uri(ConfigManager.Instance.Config.TrellisUrl);
 
         Instance = this;
+
+        TestConnection();
     }
 
     // Start is called before the first frame update
@@ -33,6 +33,12 @@ public class TrellisClient : MonoBehaviour
         
     }
 
+    private async void TestConnection()
+    {
+        var statusResp = await httpClient.GetAsync("status");
+        Debug.Log("Trellis status: " +  statusResp.StatusCode);
+    }
+
 
     public async Task<byte[]> GenerateModel(
             string imageBase64,