Server hot reload

main.js

import imports from './imports'; // <-- all your imports 
import express from 'express';

const app = express();

if (__DEVELOPMENT__) require('./serverHotReload')(app, () => {
  try {
    imports = require('./imports');
  } catch (error) {
    console.log(error.stack)
  }
});

app.use(imports.something);
app.use(imports.something2);
app.use(imports.something3);

app.listen(8000);

serverHotReload.js

import chokidar from 'chokidar';

export default function (callback) {

  const watcher = chokidar.watch('./');

  watcher.on('ready', () => {
    watcher.on('all', () => {
      console.log("Clearing /server/ module cache from server");
      Object.keys(require.cache).forEach(id => {
        if (/\/server\//.test(id)) delete require.cache[id];
      });
      callback();
    });
  });
}