Ubuntu latest apt update does not work

with ubuntu images apt-get update does not work and get the below errors

any idea how to solve this ?

fg > docker build -t d . mulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
STEP 1: FROM ubuntu:latest
STEP 2: RUN apt clean
STEP 3: RUN apt-get update
Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
             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

Does it mean that it works with other images?

By the way you are using Podman, not Docker even though the client command is called “docker”.

What is your host operating system?