Passo a passo para instalar o Docker

install-docker.sh

# Docker
sudo apt-get remove docker docker-engine docker.io
sudo apt-get update
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
sudo apt-get update && sudo apt-get install docker-ce && sudo usermod -aG docker $(whoami)
sudo addgroup --system docker
sudo adduser $(whoami) docker
newgrp docker

# Docker Compose
sudo curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose --version # test version