who to access nodejs app, in bluehost?

I have an application running on bluehost, but I can not access this.

I've tried accessing the domain (eg mydomain.com:8000), but does not work.

Is there any way to access the application without requiring a dedicated ip?

my app:

var port = 8000;

var express = require('express'),
    gen = require('./generator');

var app = express();

app.get('/', function(request, response){
    response.send('hello word!');
});

app.use(function(err, request, response, next) {
    console.error(err.stack);
    response.send(500, 'Something broke!');
});

app.listen(port);

console.log('Listening on port ' + port);