Install docker in a clean Ubuntu 20

install_docker.sh

$ \
 sudo apt-get remove \
  docker docker-engine docker.io containerd runc &&\
 sudo apt-get update &&\
 sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release &&\
 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \
  sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg &&\
 echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null &&\
 sudo apt update &&\
 sudo apt install -y \
  docker-ce docker-ce-cli containerd.io &&\
 sudo groupadd docker;
 sudo gpasswd -a $USER docker;
 sudo usermod -aG docker $USER