update domain for a feature

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

.env-production

@@ -136,9 +136,11 @@ CHIBISAFE_ALBUM_ARCHIVED=CHANGE_ME_UUID
 MARKITDOWN_BASE_URL=http://host.docker.internal:8000
 #
 #  Deployed elsewhere (e.g. Render) — no shared network with chibistar, so
-#  use the public hostname instead (zrok reserved share, see
-#  chibistar/docker-compose.yml's zrok-markitdown service):
-#    MARKITDOWN_BASE_URL=https://markitdownstarr.share.zrok.io
+#  use the public hostname instead (Cloudflare Tunnel, see
+#  chibistar/docker-compose.yml's markitdown-cloudflared service and
+#  chibistar/Caddyfile's @markitdown matcher — the zrok share,
+#  markitdownstarr.share.zrok.io, is kept alongside as a fallback):
+#    MARKITDOWN_BASE_URL=https://santa-monica.space
 #
 #  Required in both cases — /convert checks this on every request since it's
 #  reachable publicly, not just over loopback/the Docker network.