picpeak/ml has an empty Hub overview and picpeak/aio has none at all,
while backend and frontend carry hand-written ones — so the two newest
images are the two with nothing on their registry page.
Adds .github/dockerhub/{aio,ml}.md as the source of those pages and a
dockerhub-descriptions job that pushes them on every main merge, so the
page cannot drift from the release it describes. backend/frontend stay
hand-maintained for now: capturing their current Hub text into files is
a prerequisite, not a side effect of this change.
README gains a registry table for all four images (both registries share
digests and tags), the org-move callout lists the full set, and the
feature list finally mentions People in this gallery, which shipped in
#1074 without a README line.
Luca
899c9b3407