[Critical] debian repositories broken

[geek-merlin]

This docker package seems to have stopped working in gitlab-ci as of today.
apt-get update throws errors like

$ [ -f .skip-composer-install ] || ( apt-get update -qq -y && apt-get install -qq -y unzip )
W: GPG error: https://dl.yarnpkg.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23E7166788B63E1E
W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages  404  Not Found [IP: 151.101.248.204 80]

and

$ apt-get update -yqqq
W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages  404  Not Found [IP: 151.101.248.204 80]

See some discussion in the gitlab forum: Gitlab runners stopped working

where this workaround has been confirmed to work:

before_script:
  - echo -e "deb http://deb.debian.org/debian jessie main\ndeb http://security.debian.org jessie/updates main" > /etc/apt/sources.list

[oORustyOo]

Hello :)

maybe its enogth to remove this lines:
deb http://ftp.debian.org/debian jessie-updates main
deb-src http://ftp.debian.org/debian jessie-updates main
in /etc/apt/sources.list.

The reason for this problem => the repository jessie-updates was moved to archive.debian.org (see https://lists.debian.org/debian-devel-announce/2019/03/msg00006.html)

Sincerely,
Erik