Desktop installers served from this folder appear in the web UI header
(Win setup / Mac DMG / Mac PKG / Mac build kit) when present.

Populate by either:
  1) Copying files directly into this folder on the Docker host — docker-compose bind-mounts
     ./server/static/downloads to the container, so new files show up after a browser refresh
     (no docker rebuild required).
  2) Running ./deploy.sh — it zips the Mac build kit, copies dist/windows/ and dist/macos/ here,
     then compose rebuilds as usual.

Expected filenames (newest mtime wins if several match):
  TranscribeCluster-Setup-<version>.exe
  TranscribeCluster-mac-<version>.dmg
  TranscribeCluster-mac-<version>.pkg
  TranscribeCluster-mac-build-kit-<version>.zip

The build kit zip contains installer/build-macos.sh, prepare-staging.sh, installer/macos/, and
server/worker-dist/ — unzip on a Mac and run: bash installer/build-macos.sh

The Mac DMG/PKG payload (when you build it) includes TranscribeClusterAgent.app.