How to use the rpki.net Ubuntu APT repository

How to use this APT repository:

These packages are regenerated automatically by a cron job running a pbuilder environment. Please report any problems.

Name                    Last modified      Size  Description
Parent Directory - apt-gpg-key.asc 2013-03-09 19:53 2.1K pool/ 2016-03-18 20:19 - rpki.xenial.list 2016-03-24 05:00 112 dists/ 2016-03-24 05:35 - apt-gpg-key.gpg 2017-04-18 23:36 1.5K
Apache/2.4.29 (FreeBSD) OpenSSL/1.0.2m SVN/1.9.7 mod_wsgi/4.5.18 Python/2.7 Server at download.rpki.net Port 80