Installation Instructions not working with debian 11 (under WSL2)

[jonnsn]

Both instructions for debian did not work for me.

sudo wget -O /etc/apt/sources.list.d/gitlab-ci-local.sources https://gitlab-ci-local-ppa.firecow.dk/gitlab-ci-local.sources
sudo apt-get update

leads to

E: Invalid value set for option Signed-By regarding source https://gitlab-ci-local-ppa.firecow.dk/ ./ (not a fingerprint) E: The list of sources could not be read.

curl -s "https://gitlab-ci-local-ppa.firecow.dk/pubkey.gpg" | sudo apt-key add -
echo "deb https://gitlab-ci-local-ppa.firecow.dk ./" | sudo tee /etc/apt/sources.list.d/gitlab-ci-local.list
sudo apt-get update
sudo apt-get install gitlab-ci-local

leads to

dpkg-deb: error: Archive »/var/cache/apt/archives/gitlab-ci-local_4.42.0_amd64.deb« uses unknown compression for member 'control.tar.zst', giving up

Expected behavior gitlab-ci-local should be installed

Host information Debian 11 under WSL2