The server now offers the published builds on its own site (Downloads page,
Latest build on the Quest page), reading the bucket on the internal network.
Drop the standalone index.html and DORKNET_SITE_URL; the bucket needs no
public route or access app of its own.
Each run now stages what it built as DorkNet-<release>-PC-Full.zip,
-PC-Patch.zip, -Quest.xapk and -Quest-Installer.zip, writes their sizes and
SHA-256 to a manifest, and uploads them with a static page to an S3 bucket
served read-only (ci/downloads). The build scripts keep their own names,
which the launcher depends on; only the published copies are renamed.
PUBLISH_DOWNLOADS (on by default) turns the upload off per run. Jenkins
archives the same renamed files instead of the raw build output.
Alexa