Failed installation on Ubuntu 17.10

I tried to follow the installation process mentioned at https://docs.qameta.io/allure/#_installing_a_commandline with the commands

sudo apt-add-repository ppa:qameta/allure
sudo apt-get update
sudo apt-get install allure

However, after `sudo apt-get update` I get the following error:

....
Err:6 http://ppa.launchpad.net/qameta/allure/ubuntu artful Release
404 Not Found
....
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/qameta/allure/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Thus, I cannot install allure at Ubuntu 17.10.

Start with the installation instructions at docs.qameta.io/allure/#_installing_a_commandline and inspect the Debian package repository configuration for the Ubuntu artful entry. Reproduce the failure with apt-get update and determine the supported outcome for Ubuntu 17.10. Done means the installation guidance and repository behavior no longer leave this apt error unresolved.

Written by the indexing model from the issue text.