Just to clarify, this worked when I use docker (which you can see now works when you hit the domain), it's NOT working with the yum installed package.
At this point, the cert is all renewed, all good, my point is that I think there may be an issue with the certbot/centos combo (as per the original thread that I posted this on, which never got resolved) when in standalone mode.
I am happy with my setup as is, it worked up until this last renewal, however I believe the yum package was updated. It's just odd that standalone isn't working