Installing Docker

[Skybear]

I was in the process of starting to install Docker when I got an error message.

I’m following the instruction video on LearnLinux.tv:

Error: The repository 'cdrom://[Debian GNU/Linux 13.6.0 _Trixie_ - Official arm64 NETINST with firmware 20260711-09:43] trixie Release' does not have a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.