Here is a fun way to to display external websites in Ghost (with some limitations). This javascript is an "oldie but goodie" from a freebies site I used to spook around a lot back in the day. But it still works, and its still cool!

These are external websites sliding into view via this Slide-In Panel javascript:

Below is the actual content of the HTML block just above.

<ul>
<li><a href="https://noobish.me/cat-vs-ball-of-yarn/" rel="ajaxpanel" data-loadtype="iframe">Play Cat vs. Ball of Yarn</a></li>
<li><a href="https://denvergeeks.com" rel="ajaxpanel" data-loadtype="iframe">Denver Geeks Website</a></li>
<li><a href="https://flippery.ghost-o-matic.com" rel="ajaxpanel">Ghost Flip-Book Theme Demo Site</a></li>
<li><a href="https://noobish.me" rel="ajaxpanel" data-loadtype="iframe">nOObish.me</a></li>
<li><a href="https://everyamerican.com" rel="ajaxpanel" data-loadtype="iframe">Every American Website</a></li>
<li><a href="https://landing.ghost-o-matic.com" rel="ajaxpanel">Ghost Landing Demo Site</a></li>
</ul>

What makes the slide-in work (besides the HTML block, as above, pasted into the post editor here) are 2 snippets of code I copied and pasted into my Ghost site:

one snippet of CSS (pasted into this site's Settings >> Code Injection >> Site Header) and...

one snippet of Javascript (pasted into this site's Settings >> Code Injection >> Site Footer)

You can get the script here:

http://www.dynamicdrive.com/dynamicindex17/ajaxsidepanel.htm

This is to test the updating priority...