Set ready to false at Player creation

src/model/player.py

@@ -30,7 +30,7 @@ class Player(Serializable):
     game: "Game"
     turn: Turn
 
-    ready: bool = False
+    ready: bool
 
     def __init__(self, game: "Game", username: str, team: Team) -> None:
         super().__init__()
@@ -42,6 +42,7 @@ class Player(Serializable):
         self.team = team
         self.username = username
         self.turn = Turn(self)
+        self.ready = False
 
     def serialize_guest(self) -> dict:
         """Get data available to the public"""