Hello,
I am receiving this error when attempting to docker build an image in circleci that is FROM cimg/base:current-22.04
# this is the debug output from a shell script I have set in the `Dockerfile`
+ whoami
circleci
apt-get update
+ echo apt-get update
+ sudo apt-get update
Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Get:2 https://download.docker.com/linux/ubuntu jammy InRelease [48.9 kB]
Get:3 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB]
Err:2 https://download.docker.com/linux/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7EA0A9C3F273FCD8
Err:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Get:4 https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy InRelease [23.8 kB]
Err:4 https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A1715D88E1DF1F24
Get:5 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [109 kB]
Err:3 http://archive.ubuntu.com/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Get:6 http://archive.ubuntu.com/ubuntu jammy-backports InRelease [99.8 kB]
Err:5 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:6 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Reading package lists...
W: https://download.docker.com/linux/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: https://download.docker.com/linux/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: https://download.docker.com/linux/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: https://download.docker.com/linux/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7EA0A9C3F273FCD8
E: The repository 'https://download.docker.com/linux/ubuntu jammy InRelease' is not signed.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed.
W: https://ppa.launchpadcontent.net/git-core/ppa/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: https://ppa.launchpadcontent.net/git-core/ppa/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: https://ppa.launchpadcontent.net/git-core/ppa/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A1715D88E1DF1F24
E: The repository 'https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy InRelease' is not signed.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy InRelease' is not signed.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-updates InRelease' is not signed.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/git-core-ubuntu-ppa.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-backports InRelease' is not signed.
E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true'
E: Sub-process returned an error code
The command '/bin/bash -exo pipefail -c bash /var/tmp/bootstrap.sh' returned a non-zero code: 100