I'm not able to access the site over TLS, so this is currently impossible. Anyone else have better luck?
(from the installation instructions)
$ [fetch|wget] http://www.vors.stargrave.org/download/. vors-2.3.0.tar.zst
$ [fetch|wget] http://www.vors.stargrave.org/download/vors-2.3.0.tar.zst.sig
[verify signature]
$ tar xf vors-2.3.0.tar.zst
Guarantees nothing, if you're actually being attacked. You can't serve out the tarball and the public key[0] and the signature insecurely and get any guarantees about authenticity.