Docker Installation on Debian Jesie

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#Tuto for the community by M2F0
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#M2F0 03/12/2015
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############ Docker Preparation
0. Zero step, ;-), let's install 'apt-transport-https', 'cause by default apt doesn't know how to work with https connections types. To install simple type: 'apt-get install apt-transport-https -y'.
1.Now we need to open the /etc/apt/sources.list.d/docker.list file to make some changes. If the file doesn't exists, pls create it.
2. So, include this line: "deb https://apt.dockerproject.org/repo debian-jessie main" in the file. THis line will make the docker repository appoint to the correct location of the docker files.
3.To install docker on Debian Jessie is add the docker repository, so we need to add the line above:
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
4. Let's update the apt cache with the apt-get update -y.
5. Let's check if the docker repositoy is ready. To do that simple type the line: apt-cache policy docker-engine
This line will ask to the apt-cache about the docker-engine policys.
########### Docker Installation
1. In Debian, docker is call docker engine, so let's install docker:
apt-get install docker-engine
########### Docker Start
1. Once open a time, just for fun! Docker is installed. So let's start docker:
service docker start
and now let's start our first docker containner:
docker run hello-world