TypeError: Cannot read property 'substring' of undefined

I get following error when running node app using vorpal with docker-compose.

I use following `docker-compose.yml`:

```
version: '2'
services:
web:
image: node:4-slim
volumes:
- .:/app
command: node /app/dist/index.js
links:
- db
```

`dist/index.js` is just a simple script express server with vorpal attached. It works outside of docker.