Support for ember-mdi?

I'd like to make a twiddle that demonstrates using [`ember-mdi`](https://github.com/kaermorchen/ember-mdi) but it seems that it is incompatible with how ember-twiddle is set up. Is there a way to use addons here that generate assets? Not sure if I'm wording this request right, but this is the error I get:

> Unsafe attempt to load URL https://ember-twiddle.com/assets/icons.svg from frame with URL about:srcdoc. Domains, protocols and ports must match.