I'm developing NestJS App which creates a WebSocket to Binance API. I want to get stream output into browser window or postman. But now I can get stream output only in the console. I can't understand how to send these streams in the browser.

Please help

A class that creates WS stream Coin.ts

import { GetCryptocurrencies } from "./abstract/get-cryptocurrencies";
import { WebSocket } from "ws";
import { Logger } from "@nestjs/common";
import { Observable } from "rxjs";


export class Coin extends GetCryptocurrencies {
    private readonly logger = new Logger(Coin.name)
    private baseUrl: string
    private url: string
    constructor(coin: { name: string, symbol: string }[]) {
        super(coin)
        this.baseUrl = 'wss://stream.binance.com:9443/stream?streams='
        this.url = coin.map((c) => {
            return `${c.symbol.toLowerCase()}usdt@miniTicker`
        }).join('/')
        }

    getCryptoData(): any {
        const stream$ = new Observable((observer) => {

            const ws = new WebSocket(`${this.baseUrl}${this.url}`)
            ws.on('open', () => {
                this.logger.log('Connection established')
            })
            ws.onmessage = (msg: any) => {
                const message = JSON.parse(msg.data)
                observer.next(message)
            }
        })
        return stream$
    }
}

A service get-data.service.ts

import { Injectable } from '@nestjs/common';
import { map, Observable } from 'rxjs';
import { Coin } from 'src/classes/coin';
import * as coinlist from '../list/coins.json'

@Injectable()
export class GetDataService {
    getCoins(): Observable<any[]> {
        const coins = new Coin(coinlist)
        return coins.getCryptoData().pipe(map((e) => {
            console.log(e)
            return e
        }))
}
}

A controller get-data.controller.ts

import { Controller, Get, Response } from '@nestjs/common';
import { GetDataService } from './get-data.service';

@Controller('getdata')
export class GetDataController {
    constructor(private getDataService: GetDataService){}

    @Get()
    getCoinsData() {
        return this.getDataService.getCoins();
    }
}