The xinetd package should not be present in the container or container image.
Remove the xinetd package from Containerfile and rebuild the container image.
Removing the xinetd package decreases the risk of the xinetd service's accidental (or intentional) activation.
The xinetd service can be disabled with the following command:
$ sudo systemctl mask --now xinetd.service
The xinetd service provides a dedicated listener service for some programs, which is no longer necessary for commonly-used network services. Disabling it ensures that these uncommon services are not running, and also prevents attacks against xinetd itself.