GPG error: https://download.docker.com/linux/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available

sudo curl -fsSL "https://download.docker.com/linux/ubuntu/gpg" | sudo gpg --dearmor --yes -o /usr/share/keyrings/docker-archive-keyring.gpg
sudo chmod a+r /usr/share/keyrings/docker-archive-keyring.gpg