Make `iframe`able

[drewyoungren]

Make `iframe`able

[Evan-CTL]

Yes, but how it's done depends on what your plans are. Is the slideshow for something on the site or is for another site? If it's within 3Demos than we just need to specify X-Frame-Options: SAMEORIGIN. If it's for a different sit we would have to add 3Demos as a valid iframe source with Content-Security-Policy: frame-src <source>;. This assumes that we have control over the header data.

[drewyoungren]

I just have them sitting in a repo and served via Github Pages. I suppose I could move them to the same repo and serve from there, but that seems like project bloat.

[Evan-CTL]

No that should be fine, you just have to set the Content-Security-Policy on that end and we can update the 3Demos header.

[drewyoungren]

Closed by #782