To install Docker:
https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/#install-docker-ce-1
To install the other prereqs:
sudo apt install bash socat jq curl avahi-daemon dbus-daemon
To install Hass.io:
curl -sL https://raw.githubusercontent.com/home-assistant/hassio-build/master/install/hassio_install | bash -s -- -m intel-nuc