Here's how I see theme installation after this is merged:
- move theme directory (from an external repo) into `resources/themes/<name>`
- run `npm run dev` (this will put generated files and theme resources under `public/themes/<name>`
There a couple of new config options that will need to be set.
```
APP_THEME=default
WEBMAIL_URL=/apps
SUPPORT_URL=/support
SUPPORT_EMAIL=
```