If you're running Arhc Linux, it's really easy to set up Home Assistant. No need to bother with Docker containers, just install one package and you're all set.
Install
# pacman -S home-assistant
Enable and start
# systemctl enable home-assistant
# systemctl start home-assistant
Enjoy!
Give Home Assistant a minute or two and head over to http://localhost:8123/ and start configuring your smart home.