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Can I make the suggestion that you start with a <10 second overview or visual of what you'll develop by the end? Although this was a great video, I had to watch for 14 min to see the totality of what you were going to produce. Fortunately I was interested in that investment, but often I'm on a fine line for a given episode's "is this worth 15 min of my time?". When one knows where you're going, it's much easier to follow. "I'm going on vacation to NYC" happens first, then I decide if I'm driving or flying and what museums to go to.
it looks like the async queries saved time on the front end ..... but didn't that cost get paid on the backend? I'm unclear where the savings comes from ? And, are these queries cached in some way such that ensuing requests that contain those same queries would absolutely be faster?
I'm talking about "how do the files get into CF in the first place" rather than "how does my app serve them from CF once they are there"
so in the context of Rails and Heroku, how does the backend of my app know to send the files to Cloudfront, esp a file which might only rarely be requested? For example, a user's avatar which might only be shared if they ever log in again -- compared to a CSS file which may well be referenced on most every request
how did the images/css/assets get into Cloudflare in the first place? You set up the CDN, you tweak some settings for production and .... well, I can't tell.