Debian jessie problem

Hi ,
I have a problem with installation docker-engine on the jessie debian.
uname -a : Linux clean-jessy 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux
lsb_release -d : Description: Debian GNU/Linux 8.6 (jessie)

When i used manual from docs.docker.com/engine/installation/linux/debian/
on the end I get error from apt-cache policy docker-engine:
N: Unable to locate package docker-engine

the same when i used script:
wget -qO- https://get.docker.com/ | sh

in the second case it is strange that the file /etc/apt/sources.list.d/docker.list contains:
deb [arch=i386] https://apt.dockerproject.org/repo debian-jessie main

I’m not sure if the problem is in [arch=i386]
When i deleted this, or changed to [arch=amd64] the same error occurs

Any suggestions ?
regards, Olaf