Started setting up relay support

Assets/Scripts/MainMenu/MainMenuController.cs

@@ -1,4 +1,5 @@
 using PashaBibko.PenguinChase.Core.Network;
+using WebSocketSharp;
 using UnityEngine.UI;
 using UnityEngine;
 
@@ -7,19 +8,32 @@ public class MainMenuController : MonoBehaviour
     [Header("References")]
     [SerializeField] private Button HostButton;
     [SerializeField] private Button JoinButton;
+    [SerializeField] private InputField HostCode;
+    [SerializeField] private Dropdown HostNetworkType;
 
     private void Start()
     {
         HostButton.onClick.AddListener(() =>
         {
-            Network.CurrentTransport = TransportType.Localhost;
+            Debug.Log($"[{HostNetworkType.captionText.text}]");
+            Network.CurrentTransport = HostNetworkType.captionText.text switch
+            {
+                "Localhost" => TransportType.Localhost,
+                "UnityRelay" => TransportType.UnityRelay,
+                var _ => throw new System.NotImplementedException("Unknown transport type")
+            };
+
             Network.Host();
         });
 
         JoinButton.onClick.AddListener(() =>
         {
-            Network.CurrentTransport = TransportType.Localhost;
-            Network.Join("");
+            string code = HostCode.text;
+            Network.CurrentTransport = code.IsNullOrEmpty()
+                ? TransportType.Localhost
+                : TransportType.UnityRelay;
+
+            Network.Join(code);
         });
     }
 }