Install docker on Ubuntu 20.04 LTS

docker-install.sh

# Update packages list:
sudo apt update

# Prerequsites:
sudo apt install apt-transport-https ca-certificates curl software-properties-common

# Add the GPG key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

# Now add the docker reop
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"

# Update packages list
sudo apt update

# Cache official docker repo:
apt-cache policy docker-ce

# Install
sudo apt install docker-ce

# Check Status:
sudo systemctl status docker

thanks bro