I have error when i use ssl+pm2

[info-infoman]

Hi, i have error in socket.io when i use ssl+pm2

i have change:
in src/server/index.js
`// @flow

import compression from 'compression'
import express from 'express'
import { Server } from 'https'
import fs from 'fs'
//import engineIO from 'engine.io'
import socketIO from 'socket.io'
import routing from './routing'
import { WEB_PORT, STATIC_PATH } from '../shared/config'
import { isProd } from '../shared/util'
import setUpSocket from './socket'

const app = express()
// flow-disable-next-line
var options = {
key: fs.readFileSync('./privkey1.pem'),
cert: fs.readFileSync('./cert1.crt'),
ca: fs.readFileSync('./lec.crt')
};
const http = Server(options, app)
const io = socketIO(http)
//const io = engineIO(http)
setUpSocket(io)

app.use(compression())
app.use(STATIC_PATH, express.static('dist'))
app.use(STATIC_PATH, express.static('public'))

routing(app)

http.listen(WEB_PORT, () => {
// eslint-disable-next-line no-console
console.log(Server running on port ${WEB_PORT} ${isProd ? '(production)' : '(development).\nKeep "yarn dev:wds" running in an other terminal'}.)
})`

and in package.json:
"prod:start": "cross-env NODE_ENV=production pm2 start lib/server -i 0 && pm2 logs",

and when i start yarn prod:start
my chrome have error with socket connect (error 400)
and error ssl sert with wss://***** connect

i try use engine.io but i d't know how do it...
pls help - how use engine.io in this project?
sorry for my english