Quickstart says to create superuser when prompted, but there is no prompt

I am trying out NSOT inside an Ubuntu 16.04 lxd container. I have installed python2 and the other [requirements](http://nsot.readthedocs.io/en/latest/install/ubuntu.html#installation). I have created a virtualenv but otherwise am following [the quickstart](http://nsot.readthedocs.io/en/latest/quickstart.html) guide.

```
virtualenv venv
. venv/bin/activate
pip install nsot
nsot-server init
# Edit ~/.nsot/nsot.conf.py to set NSOT_HOST = '0.0.0.0'
nsot-server start
```

All appears to be fine: it applies all the migrations and starts the webserver, and I can connect.

The problem is that although the Quick Start guide says to "create a superuser when prompted", there is no such prompt. I therefore wonder whether some initialisation step has been missed?

I can [create one manually](http://nsot.readthedocs.io/en/latest/admin.html#create-a-superuser) and it seems to be OK. Is this just a step missing from the Quick Start?