Tengo tres archivos cuando intento ejecutar el archivo index.js DB funciona bien pero el router no funciona y si ejecuta server.js DB y el router no funciona

servidor

 import express from 'express' import cors from 'cors' import restaurants from './api/restaurants.route.js' const app = express() app.use(cors()) app.use(express.json()) app.use("/api/v1/restaurants", restaurants) app.use("*", (req, res) => res.status(404).json({error: "Not Found"})) // any router not found in our routers export default app;

índice

 import app from './server.js' import mongodb from 'mongodb' import dotenv from 'dotenv' dotenv.config() const mongoClient = mongodb.MongoClient const port = process.env.PORT || 8000 mongoClient.connect( process.env.RESTREVIEWS_DB_URI, { useNewUrlParser: true, useUnifiedTopology: true, } ).catch((e) => { console.log(e.stack) process.exit(1) }).then(async client => { app.listen(port, () => { console.log(`app listen in link http://localhost:${port}/api/v1/restaurants`) }) })

enrutador

 import express from 'express' const router = express.Router(); router.get('/api/v1/restaurants', (req, res) => { res.status(200).send("HelloWorld"); }) export default router