Simple Express.js static file/folder configuration with Express API

server.js

var express    = require('express')
  , app        = express()
  , http       = require('http')
  , server     = require('http').Server(app)
  , bodyParser = require('body-parser')
  , io         = require('socket.io')(server);

// ---------------------------------------------------------------------------
// Configuration
// ---------------------------------------------------------------------------

// Server
server.listen(process.env.PORT || 8000, function(){
  console.log('[ server.js ] Listening on port ' + server.address().port);
});

// Socket.io configs
io.set('heartbeat timeout', 4000);
io.set('heartbeat interval', 2000);

// Express server configs
app.use(bodyParser.urlencoded({
    extended: true
}));
app.use(bodyParser.json());
app.use(express.static(__dirname + '/public'));

// ---------------------------------------------------------------------------
// Socket Event Listeners
// ---------------------------------------------------------------------------

io.on('connection', function(socket){

  console.log(socket.id + " connected...");

  socket.on('disconnect', function(){
    console.log(socket.id + " disconnected...");
  });

});

// ---------------------------------------------------------------------------
// Express API
// ---------------------------------------------------------------------------

app.get('/api/test', function(req, res){
  res.status(200).send('OK');
});

// ---------------------------------------------------------------------------
// Application Logic
// ---------------------------------------------------------------------------
// ...