download github user content (uploaded images) instead of relying on external links?

[gschare]

Github-flavored markdown automatically uploads images you copy-paste into a message body as a raw.githubusercontent.com external link.
We may want to download all of these images an serve them either statically from the website repo itself or load them from, for example, an S3 bucket we create to archive them.

In any case, the first step is to investigate how many images that might be, how big they are, etc.
In general, external links are a concern.