nghinguyenvan

#1.Install packages to allow apt to use a repository over HTTPS:
sudo apt-get install -y --no-install-recommends \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common
    
#2.Add Docker official GPG key:
curl -fsSL https://apt.dockerproject.org/gpg | sudo apt-key add -