de1m

При таком подходе, пропадает необходимость использовать app.get(), так как все файлы и так будут отданы. Плюс, смущает факт того, что доступ к файлам можно получить прописав путь напрямую /home/index.html

var express = require('express');  
var app = express();  
var server = require('http').createServer(app);  
var io = require('socket.io')(server);
var fs = require('fs');
var https = require('https');

app.set('views', __dirname + '/views')
app.set('view engine', 'pug')
app.use(express.static(__dirname + '/public'))

server.listen(5000, function () {
  console.log('Server listening at port %d', 5000);
});

const opts = {
  key: fs.readFileSync('privateKey.key'),
  cert: fs.readFileSync('certificate.crt')
}

var httpsServer = https.createServer(opts, app);
httpsServer.listen(5001, function(){
  console.log("HTTPS on port " + 5001);
})

app.get('/', function (req, res) {
  res.render('index');
})

io.attach(httpsServer);
io.attach(server);

io.on('connection', function(client) {  
    console.log('Client connected...');
    client.on('click', function(data){
      console.log(JSON.parse(data));
        setTimeout(function() {
          client.emit("ok", "data");
        }, 3000);
    })
});

if (window.location.protocol != "https:"){
        var socket = io.connect('https://localhost:5001');    
    } else {
        var socket = io.connect('http://localhost:5000');
    }

TypeError [ERR_INVALID_CHAR]: Invalid character in header content ["Authorization"]

setInterval(function () {
        let startTime = process.hrtime.bigint();
        connection.query('SELECT * FROM drops ORDER BY id DESC LIMIT 10', function (error, result, fields) {
            socket.emit('games', result);
        });
        let endTime = process.hrtime.bigint();
        console.log("DB Req1: " + (endTime - startTime)); // in nanosec.
    }, 2000);

var child = require('child_process').execFile;
var executablePath = "C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe";

child(executablePath, function(err, data) {
    if(err){
       console.error(err);
       return;
    }
 
    console.log(data.toString());
});

io = require('socket.io').listen(httpsServer);
io.on('connection', function(socket) {
  socket.on('getUserInfo', function(e) {
    //code
     ...
    socket.emit('sendUserInfo', data)
  })
});