The club gets a poster: a marketing page at /promo, drawn from the game's own sprites

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Dockerfile

@@ -18,6 +18,7 @@ COPY --from=test /tests-passed /tmp/tests-passed
 COPY index.html manifest.webmanifest manifest-stg.webmanifest server.py /app/
 COPY src /app/src
 COPY assets /app/assets
+COPY promo /app/promo
 # THE SCORES LIVE HERE AND THIS MUST BE A PERSISTENT VOLUME. Without one the json sits in the
 # container's writable layer and every deploy silently resets the leaderboard to empty — which
 # looks exactly like the feature working until the first time you push.