Ubuntu 14.04 dockercloud-agent missing

I crated a new Ubuntu 14.04 server instance and tried to install dockercloud-agent. The package cannot be found in the standard repository. Do I need to add a specific repository for docker components?

root@docker:~# apt-get install dockercloud-agent
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package dockercloud-agent
root@docker:~# 

Checking all known packages including the name docker, I get the following list. Unfortunately, no dockercloud-agent is part of this list:

root@docker:~# apt-cache dump | grep -i docker | grep Package | sort -u
Package: docker
Package: docker:i386
Package: docker.io
Package: docker.io:i386
Package: golang-docker-dev
Package: kdocker
Package: kdocker:i386
Package: vim-syntax-docker
root@docker:~# 

Any help?

Problem solved: The documentation at https://docs.docker.com/docker-cloud/infrastructure/byoh/#install-the-docker-cloud-agent was not clear to me. After reading it again, I finally understood the way the dockercloud-agent is installed.