Installation

install current version (ubutnu/debian)

curl -sSL https://get.docker.com | sh
sudo usermod -aG docker danielraab
newgrp docker # to add docker in your current shell instance

execute docker without sudo

sudo groupadd docker if not already exists
sudo usermod -aG docker $USER add user to group
logout and login, or restart on VM

proxy settings

create file in /etc/systemd/system/docker.service.d/http-proxy.conf

[Service]
Environment="HTTPS_PROXY=http://www-zproxy.fronius.myProxy.com:80/"
Environment="HTTP_PROXY=http://www-zproxy.fronius.myProxy.com:80/"
Environment="NO_PROXY=localhost,127.0.0.1,fronius.myProxy.com,10.0.0.0/8"

than execute

systemctl daemon-reload
systemctl restart docker

systemctl show --property Environment docker