How to properly upload assets in nodejs express using ssl?

Question

Node.js

Using code like this (below) ssl works fine for preset roots, root using express.static works with mixed success. Sometimes when requesting the file "/assets/img/image_name.extension" it gives the client an error 525. How to fix it?

var app = express();

var options = {
    key: fs.readFileSync(__dirname+'/certificate.key'),
    cert: fs.readFileSync(__dirname+'/cert.crt'),
    requestCert: true
};

var server = http.createServer(app);
var secureServer = https.createServer(options, app);
var io = require('socket.io').listen(secureServer);

app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.use(session({secret: g_ExpressSecret, name: g_ExpressName, resave: true, saveUninitialized: true}));
app.use(passport.initialize());
app.use(passport.session());
app.use(forceSSL);
app.use('/assets', express.static(__dirname + '/views/public'));

secureServer.listen(443);
server.listen(80);

app.get('/', function(req, res){
  console.log('requested /');
});