fix some build issues

add option for server port

src/main/java/io/ib67/sfcraft/config/SFConfig.java

@@ -10,6 +10,7 @@ import java.util.concurrent.ThreadLocalRandom;
 public class SFConfig {
     public boolean enableOfflineExempt = true;
     public String domain = "localhost";
+    public int port = 25565;
     public String webApiBase = "localhost";
     public String serverSecret = RandomStringUtils.random(32);
     public int httpPort = 8080;

src/main/java/io/ib67/sfcraft/room/RoomTeleporter.java

@@ -57,7 +57,7 @@ public class RoomTeleporter {
                 )
         );
         networkHandler.send(new StoreCookieS2CPacket(ROOM_COOKIE, cookie), PacketCallbacks.always(() -> {
-            networkHandler.sendPacket(new ServerTransferS2CPacket(config.domain, serverSupplier.get().getServerPort()));
+            networkHandler.sendPacket(new ServerTransferS2CPacket(config.domain, config.port));
         }));
     }
 }