The mailing list embedding does not render when I open index.html file locally. How did you tested it?

Unfortunately the frame will not render the google group locally. The url embedded in the iframe had a parameter called 'parenturl'. The parenturl has to match the domain that the document with the iframe is being served from. When tested locally the url for local files on our computers is weird and the browsers didn't like it when they cross checked the origin I believe.
For testing, I opened it from my github repo (https://franklin-feingold.github.io/BIDS/). From there I saw that the webpage displays the embedded google group.

Thanks!

could you fix the styling?

I added a white background fill behind the embedded google group to improve the contrast. It looks better and can see the different posts more clearly.

Awesome! Thanks!