Apollo server express, Mongoose, Resolver chains

 import { ApolloServer } from '@apollo/server';

    
 import { expressMiddleware } from '@apollo/server/express4';
    
 import { ApolloServerPluginDrainHttpServer } from '@apollo/server/plugin/drainHttpServer';
    
 import express from 'express';
    
 import http from 'http';
    
 import cors from 'cors'