createWebSocketServer never resolves when called after createServer (http)

[jan-kacina]

Hi @JozefFlakus ,
during investigation of #340 I noticed a strange behavior of createWebSocketServer - it never resolves when it is called after HTTP's createServer.

When there is only createWebSocketServer or if it is in order createWebSocketServer and then createServer, it works fine.

Is this an intentional behavior or a bug?

The problem reproduction code:

import { createServer, httpListener, HttpStatus, matchEvent, r } from '@marblejs/core'
import { createWebSocketServer, webSocketListener, WsEffect } from '@marblejs/websockets'
import { IO } from 'fp-ts/lib/IO'
import { mapTo } from 'rxjs/operators'

// *** Web Socket Server Definition ***
const wsHello$: WsEffect = (event$) => event$.pipe(
  matchEvent('HELLO'),
  mapTo({ type: 'HELLO', payload: 'Hello, world!' }),
)

const wsServer = createWebSocketServer({
  options: {
    port: 1338,
    host: '127.0.0.1',
  },
  listener: webSocketListener({ effects: [wsHello$] }),
})

// *** Http Server Definition ***
const httpHello$ = r.pipe(
  r.matchPath('/test'),
  r.matchType('GET'),
  r.useEffect((req$, ctx) => req$.pipe(
    mapTo({ status: HttpStatus.ACCEPTED }),
  )),
)

const httpServer = createServer({
  port: 1337,
  hostname: '127.0.0.1',
  listener: httpListener({ effects: [httpHello$] }),
})

// *** App bootstrap ***
const main: IO<void> = async () => {
  console.log("Before creating http server")
  await (await httpServer)()
  console.log("After creating http server")

  console.log("Before creating web socket server")
  await (await wsServer)()
  console.log("After creating web socket server") //this never happens
}

main()

Thanks and regards,
Jan