feat: logging

src/main.rs

@@ -94,8 +94,10 @@ fn client_exit(room_map: &RoomMap, room_id: &Option<String>, client_id: &Option<
     if let (Some(room_id), Some(client_id)) = (room_id, client_id) {
         let mut room_map = room_map.lock().unwrap();
         if let Some(client_map) = room_map.get_mut(room_id) {
+            information!("Client: {} exit from room: {}", client_id, room_id);
             client_map.remove(client_id);
             if client_map.is_empty() {
+                information!("Room is empty, close room: {}", room_id);
                 room_map.remove(room_id);
             }
         }