Docker ppa package for Ubuntu 19.10
The Docker repository currently have packages for 20.04 (focal), so you can follow official guide or use commands below:
sudo apt install curl
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 focal stable"
sudo apt install docker-ce