I edited your post to use code blocks so you will not end up being blocked by the spam filter for sharing too many links. Please, follow this guide to use code blocks: How to format your forum posts
Regarding the error message, I’m not sure we interpret it correctly. I tried to change the name server to a non-existing ip address and I got the “Ign” lines, although slowly, and then I got the error messages. In my case, multiple messages.
What I noticed is that in your outputs you have ubuntu.com, but in mine it is http://ports.ubuntu.com/ubuntu-ports
Ign:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
Ign:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
Ign:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
Err:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
Temporary failure resolving 'ports.ubuntu.com'
Err:2 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
Temporary failure resolving 'ports.ubuntu.com'
Err:3 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
Temporary failure resolving 'ports.ubuntu.com'
Err:4 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
Temporary failure resolving 'ports.ubuntu.com'
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/jammy/InRelease Temporary failure resolving 'ports.ubun
tu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/jammy-updates/InRelease Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/jammy-backports/InRelease Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/jammy-security/InRelease Temporary failure resolving 'ports.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
It shouldn’t be different. Are you sure the Ubuntu image you are using is the official image or it is provided by GitLab?
Update:
On second thought, it could be different if GitLab just changes the repo urls for performance or security reasons.