index.ts

const gameServer = new Server({
  gracefullyShutdown: false,
});

registerGracefulShutdown(async (err) => {
  console.log('shutting down...');
  await broadcastAll('Sorry to interrupt. Servers are restarting shortly.');
  await delay(10000);
  await gameServer.gracefullyShutdown(true, err);
});

export async function broadcastAll(message: string) {
  const roomListings = await matchMaker.query();

  for (const listing of roomListings) {
    await matchMaker.remoteRoomCall(listing.roomId, 'broadcast', ['alert', message]);
  }
}