I'm following this guide, but once I run apt update, I get this error:
GPG error: https://download.docker.com/linux/debian bullseye InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7EA0A9C3F273FCD8The repository 'https://download.docker.com/linux/debian bullseye InRelease' is not signed.
Any help is appreciated!