boilerplate-backend/src/server/server.ts

import { ApolloServer } from '@apollo/server'
import { startStandaloneServer } from '@apollo/server/standalone'

import { schema } from '#graphql/schema'

export const createServer = async (): Promise<ApolloServer> => {
  return new ApolloServer({
    schema: await schema(),
  })
}

export async function listen(port: number) {
  const { url } = await startStandaloneServer(await createServer(), {
    listen: { port },
  })

  return url
}