nodemon with express+mongoose

docker-compose.yml

version: "3"

services:
  mongo:
    image: mvertes/alpine-mongo
    hostname: mongo
    ports:
     - 27017:27017

index.js

const express = require("express");
const mongoose = require("mongoose");

const app = express();

app.use((req, res, next) => {
  res.send("<h1>Hello from Express!</h1>");
});

async function run() {
  console.time("run");
  const server = await app.listen({ host: "0.0.0.0", port: 3001 });
  console.log("express app on 3001");
  console.log("address: %j", server.address());
  console.timeEnd("run");
}

async function run2() {
  console.time("run2");
  await mongoose.connect("mongodb://localhost:27017/test");
  console.log("connected to mongo");
  const server = await app.listen({ host: "0.0.0.0", port: 3001 });
  console.log("express app on 3001");
  console.log("address: %j", server.address());
  console.timeEnd("run2");
}

async function run3() {
  console.time("run3");
  await mongoose.connect("mongodb://localhost:27017/test");
  console.log("connected to mongo");
  const server = await app.listen({ host: "0.0.0.0", port: 3001 });
  console.log("express app on 3001");
  setImmediate(() => {
    console.log("address: %j", server.address());
  })
  console.timeEnd("run3");
}

/* just app.listen() - instance method .address() works correctly */
run()

/*
  db.connect & app.listen() - .address() is undefined within
  the currect iteration of the loop
*/
// run2()

/*
  db.connect & app.listen() & setImmediate
  .address() work correctly
  the nature of synchronicity between mongoose and express
  might be causing problems
*/
// run3()