How to solve Socket.io blocked CORS issue?

Question

Node.js

Good afternoon.
There is a problem when trying to connect a client to sockets:

Access to XMLHttpRequest at ' https://domen/socket.io/?token=eyJhbGciOiJIUzI1NiI... ' from origin ' localhost:7070 ' has been blocked by CORS policy: No 'Access- Control-Allow-Origin' header is present on the requested resource.

I've seen many similar situations, but they don't work. If anyone has already solved this problem.

sockets/index.ts

export class Socket {

    private readonly _io;

    public constructor(server: http.Server) {
        this._io = require('socket.io')(server);
        this._io.set('origins', '*:*');
        this._io.origins('*:*');
        this._io.adapter(redis({ host: process.env.REDIS_URL, port: 6379 }));
    }

    public initialize(): void {
        sellerSocket(this._io);
        courierSocket(this._io);
    }

}

index.ts

class Program {

    public static readonly NODE_ENV: string = process.env.NODE_ENV || "development";
    public static readonly PORT: string = process.env.PORT || "7070";
    public static readonly HOST: string = process.env.HOST || "localhost";

    public static async Main(): Promise<void> {
        Logger.clear();
        Logger.info(`NODE_ENV: ${this.NODE_ENV}`);

        const connectionOptions = await getConnectionOptions(this.NODE_ENV);
        await createConnection({ ...connectionOptions, name: "default" } as any);
        await bootstrap();

        const application: Application = container.get<Application>(TYPES.IApplication);
        application.initialize();
        const server = http.createServer(application.app);

        const socket = new Socket(server);
        socket.initialize();

        server.listen(this.PORT, () => {
            Logger.application(`Application ready`);
            Logger.info(`http://${this.HOST}:${this.PORT}`);
            Logger.info("Heap: " + (process.memoryUsage().heapTotal / (1024 * 1024)).toFixed(2) + " MB");
            Logger.info("CPU Time: " + process.cpuUsage().user);
        });
    }

}

Program.Main();

client/seller.js

const socket = io.connect(`${serverUrl}/sellers`, { query: { token: data.authorizationToken }, secure: false });

        socket.on("ADD_ORDER", (data) => {
            console.log(data);
            createOrderBlock(data);
        });

        socket.on("ORDERS", (orders) => {
            console.log(orders);
            for (const data of orders) { createOrderBlock(data); }
        })