Minimist missing from the backstopjs docker image?

I installed backstop using the docker image backstopjs/backstopjs.

When I try to run backstop with a JavaScript configuration I receive an error that minimist is missing:

```
~/W/S/v/t/backstop ❯❯❯ backstop reference --configPath=backstop-settings.js --testhost=http://example.com ✘ 1
\BackstopJS v4.1.9
Loading config: /src/backstop-settings.js
internal/modules/cjs/loader.js:584
throw err;
^
Error: Cannot find module 'minimist'
```
Is minimist missing from the backstopjs docker image?