Node.js and UWS scalable chat server using Redis (ioredis)

chatServer.js

var WebSocketServer = require('uws').Server;
var wss = new WebSocketServer({ port: 3000 });

var Redis = require('ioredis');
var redis = new Redis('localhost', 6379);
var pub = new Redis('localhost', 6379);

redis.subscribe('msg', function (err, count) {
    // Now we are subscribed to the 'msg' channel.
    // `count` represents the number of channels we are currently subscribed to.
    console.log('subscribed')
});

redis.on('message', function (channel, message) {
    console.log('Receive message %s from channel %s', message, channel);
    if (channel === 'msg') {
        wss.clients.forEach(c => {
            c.send(message)
        })
    }
});

function onMessage(ws, msg) {
    console.log('received: ' + msg);
    pub.publish('msg', msg);
}

wss.on('connection', function (ws) {
    ws.on('message', (msg) => onMessage(ws, msg));
});

P.S. try to run 3 same servers in Docker with Redis and Nginx as load balancer