Add dist/ to .gitignore, and prevent new games from having a broken gameId

src/client-entry.ts

@@ -109,7 +109,6 @@ wsClient.onOpen(() => {
   const playerId = `player-${Math.random().toString(36).substring(2, 9)}`;
   const joinMessage = {
     type: 'join_game',
-    gameId: 'some-game-id',
     playerId: playerId,
   };
   wsClient.send(JSON.stringify(joinMessage));