File: engine/install/ubuntu.md
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
Should be replaced with something like
wget https://download.docker.com/linux/ubuntu/gpg -O /etc/apt/trusted.gpg.d/docker.gpg
File: engine/install/ubuntu.md
Should be replaced with something like