Documentation is missing: "How do I properly add a new signing key for newly added repository persistently to Tails?"
How do I properly add a new signing key for newly added repository persistently to Tails?
The Tails Configuring additional APT repositories documentation explains how to add a repository, but it's missing to explain how to add a new signing key. When a user adds a new repo that is not signed by Debian's keyring, apt update will result in an error "missing key".
Reading in https://community.signalusers.org/ there seems to be several user that are in need for such documentation. (me too, actually)