docker fails to apt repo

[jvinolas]

Bug description

I did the build and failed

Expected behaviour

Should build

Actual behaviour

Status: Downloaded newer image for jupyter/base-notebook:python-3.7.6
 ---> 43c995183265
Step 2/10 : USER root
 ---> Running in 7f701b6fa23c
Removing intermediate container 7f701b6fa23c
 ---> 205da6c2c11a
Step 3/10 : RUN apt-get -y update  && apt-get install -y dbus-x11    firefox    xfce4    xfce4-panel    xfce4-session    xfce4-settings    xorg    xubuntu-icon-theme
 ---> Running in 70736492727a
Get:1 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
  At least one invalid signature was encountered.
Get:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Err:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
  At least one invalid signature was encountered.
Err:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
  At least one invalid signature was encountered.
Err:2 http://security.ubuntu.com/ubuntu focal-security InRelease
  At least one invalid signature was encountered.
Reading package lists...
W: GPG error: http://archive.ubuntu.com/ubuntu focal InRelease: At least one invalid signature was encountered.
E: The repository 'http://archive.ubuntu.com/ubuntu focal InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu focal-updates InRelease: At least one invalid signature was encountered.
E: The repository 'http://archive.ubuntu.com/ubuntu focal-updates InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu focal-backports InRelease: At least one invalid signature was encountered.
E: The repository 'http://archive.ubuntu.com/ubuntu focal-backports InRelease' is not signed.
W: GPG error: http://security.ubuntu.com/ubuntu focal-security InRelease: At least one invalid signature was encountered.
E: The repository 'http://security.ubuntu.com/ubuntu focal-security InRelease' is not signed.
The command '/bin/bash -o pipefail -c apt-get -y update  && apt-get install -y dbus-x11    firefox    xfce4    xfce4-panel    xfce4-session    xfce4-settings    xorg    xubuntu-icon-theme' returned a non-zero code: 100

How to reproduce

1. git clone your repo
2. docker build -t $(whoami)/$(basename ${PWD}) .

Your personal set up

• OS: Ubuntu 20
• Version(s): latest git clone
• Full environment

# paste output of `pip freeze` or `conda list` here

• Configuration

# jupyterhub_config.py

• Logs

# paste relevant logs here, if any