/tailwind route throws uncaught error: Could not find module `dummy/tailwind/config/colors`

**ember-cli-addon-docs@0.4.2**

I've enabled the build to include the style guide by setting `shouldIncludeStyleguide` to `true` in my addon's `ember-cli-build.js`.

```javascript
// ember-cli-build.js
const EmberAddonDocs = require('ember-cli-addon-docs');
EmberAddonDocs.options['ember-cli-tailwind'].shouldIncludeStyleguide = true;
```
Once the dummy app is deployed, visiting `/tailwind` results in a JS error:

```
Uncaught Error: Could not find module `dummy/tailwind/config/colors` imported from `dummy/controllers/application-tailwind`
at missingModule (loader.js:247)
at findModule (loader.js:258)
at Module.findDeps (loader.js:168)
at findModule (loader.js:262)
at requireModule (loader.js:24)
at Class._extractDefaultExport (index.js:411)
at Class.resolveOther (index.js:114)
at Class.superWrapper [as resolveOther] (ember-utils.js:428)
at Class.resolveController (resolver.js:223)
at Class.resolve (resolver.js:130)
```

Beginne damit, die bereitgestellte Dummy-App mit aktiviertem shouldIncludeStyleguide in ember-cli-build.js zu reproduzieren. Untersuche anschließend die Route /tailwind und den Import aus dummy/controllers/application-tailwind. Ermittle, warum dummy/tailwind/config/colors nicht verfügbar ist; fertig ist die Aufgabe, wenn der Aufruf von /tailwind nicht mehr den Fehler wegen des fehlenden Moduls auslöst.

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