fix: synced timer

app/src/main/java/game/Game.java

@@ -1,5 +1,6 @@
 package game;
 
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -14,10 +15,13 @@ public class Game {
 		GameNotStarted, GameGoing, GameEnd
 	}
 
+	public static final int GAME_DURATION = 10 * 60;
+
 	private final Map<Integer, Player> players;
 	private final List<Player> leaderboard;
 	private GameState gameState;
 	private MultiDoku doku;
+	private Instant startTime = null;
 
 	public Game() {
 		this.players = new HashMap<>();
@@ -49,9 +53,10 @@ public class Game {
 		return players;
 	}
 
-	public void startGame(MultiDoku doku) {
+	public void startGame(MultiDoku doku, Instant startTime) {
 		this.doku = doku;
 		this.gameState = GameState.GameGoing;
+		this.startTime = startTime;
 	}
 
 	public GameState getGameState() {
@@ -66,4 +71,8 @@ public class Game {
 		return leaderboard;
 	}
 
+	public Instant getStartTime() {
+		return startTime;
+	}
+
 }