SEO. Переход с http на https

var fs = require('fs');

var options = {
  key: fs.readFileSync('ssl/privkey.pem'),
  cert: fs.readFileSync('ssl/fullchain.pem')
};

var httpServer = require('http').createServer();
var httpsServer = require('https').createServer(options);
var ioServer = require('socket.io');

var io = new ioServer();
io.attach(httpServer);
io.attach(httpsServer);
httpServer.listen(7165);
httpsServer.listen(7166);

io.sockets.on('connection', function(socket){});

var port = location.protocol === 'https:' ? 7166 : 7165;
var socketIO = io(0.0.0.0:'+port);

socketIO.once('connect', function(){});

var socketIO = io('0.0.0.0:'+port);