How to use the rpki.net Ubuntu APT repository

How to use this APT repository:

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

Name                    Last modified      Size  Description
Parent Directory - pool/ 2013-03-08 15:03 - dists/ 2014-09-28 06:04 -
Apache/2.4.43 (FreeBSD) OpenSSL/1.1.1g SVN/1.14.0 mod_wsgi/4.7.0 Python/2.7 Server at download.rpki.net Port 80