Resolve issue with loading Dockstore UI in Unity-UI

[anilnatha]

We (UIUX) tried to load the Dockstore interface into the Unity-UI by embedding it in an iframe.

The browser reports that we need to resolve a CORS issue for the UI to be displayed via an iframe.

[mcduffie]

The uploaded screenshot makes text illegible

[anilnatha]

@mcduffie reuploaded the image. Sorry about that, not sure what happened.