port 1337 didn't work

Running docker run -p 80:1337 <containerid>

Following command didn't work
```bash
$ curl http://$(boot2docker ip):1337
```
But this worked for me
```bash
$ curl http://$(boot2docker ip):80
```
Not being an expert I guess it is right to use the hostPort (from the doc : " hostPort:containerPort ")
Merge pull request #6 from OlivierCuyp/patch-1

port 1337 didn't work