index.ts

import { ApolloServer } from 'apollo-server-express'
import { ApolloServerPluginDrainHttpServer } from 'apollo-server-core'
import express from 'express'
import http from 'http'
import { schema } from './schema.js'

async function startApolloServer() {
  const app = express()
  const httpServer = http.createServer(app)

  const server = new ApolloServer({
    schema,
    plugins: [ApolloServerPluginDrainHttpServer({ httpServer })]
  })

  await server.start()
  server.applyMiddleware({
    app,
    path: '/'
  })

  // Modified server startup
  await new Promise<void>((resolve) =>
    httpServer.listen({ port: 4000 }, resolve)
  )
  console.log(`🚀 Server ready at http://localhost:4000${server.graphqlPath}`)
}
startApolloServer()