Docker label array problem with Unraid

Hello,

first, thank you so much for adding support for labels and config files! This helps so much.

I'm having trouble adding any label of type array via the Unraid UI (e.g. sso-roles). This is because Unraid handles all labels as strings, regardless of what is typed into the field.
This works fine with the boolean (`pangolin.proxy-resources.res-name.auth.sso-enabled=true`) but not for arrays.

I tried these different versions:

```
pangolin.proxy-resources.res-name.auth.sso-roles=["Member"]
pangolin.proxy-resources.res-name.auth.sso-roles='["Member"]'
pangolin.proxy-resources.res-name.auth.sso-roles=Member
pangolin.proxy-resources.res-name.auth.sso-roles=["Member","Other Group"]
pangolin.proxy-resources.res-name.auth.sso-roles=Member,Other Group
```

Would it be possible to add a parser that can convert these labels to the desired type?