import { MongoMemoryServer } from 'mongodb-memory-server'; const mongo = await MongoMemoryServer.create({ instance: { port: 27017, dbName: 'lean101', ip: '127.0.0.1' } }); console.log(`MongoDB demo server running at ${mongo.getUri()}`); console.log('Press Ctrl+C to stop it.'); const shutdown = async () => { await mongo.stop(); process.exit(0); }; process.on('SIGINT', shutdown); process.on('SIGTERM', shutdown);