In the WebSocketClientChannel example, ECONNREFUSED crashes the app

[vjpr]

If it cannot connect to the server, the app will crash because there is no error event handler.

The error handler in the example is only attached after open.

    let ws: WebSocket | null = null
    try {
      ws = new WebSocket(this._host)
    } catch (err) {
      setTimeout(() => this._init, 500)
    }
    ws.on('error', (err) => { <------- added
      console.log({err})
    })
    ;(ws as WebSocket).on('open', () => {
      this._ws = ws as WebSocket
      this._ws.on('close', reinit)
      this._ws.on('error', e => {
        this._error(e)
        reinit()
      })

Error: connect ECONNREFUSED 127.0.0.1:55555
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1142:16)
Emitted 'error' event on WebSocket instance at:
    at ClientRequest.<anonymous> (/Uxxx/node_modules/.pnpm/ws@7.4.3/node_modules/ws/lib/websocket.js:579:15)
    at ClientRequest.emit (events.js:315:20)
    at Socket.socketErrorListener (_http_client.js:463:9)
    at Socket.emit (events.js:315:20)
    at emitErrorNT (internal/streams/destroy.js:100:8)
    at emitErrorCloseNT (internal/streams/destroy.js:68:3)
    at processTicksAndRejections (internal/process/task_queues.js:84:21) {