Home Assistant Installation Confused :/


I used to have HA installed in a Docker on a RPi3B+ (on SSD), I had the Supervisor option from which I was able to make updates etc.
Question … what is this setup called? And will it be supported?

Now I re-installed from scratch using the command taken from here using command:

docker run --init -d --name="home-assistant" -e "TZ=America/New_York" -v /home/pi/homeassistant:/config --net=host homeassistant/raspberrypi3-homeassistant:stable

But now I do not have the Supervisor, and I dont know from where I can restore the backup.
Which version of HA should I install? I would like to use an external SSD, so the image listed here will not work.

Any ideas what should I do? I am really confused on the way forward at this stage.
I know this question is really common but I would like someone to guide me.

Thanks in advance

See the list of “Supported installation methods” here:

I believe you are looking for home assistant supervised. There are installation guides for a number of operating systems here:

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thanks @tom_l … really useful but there is no info how I can install a supported version of HA on a Pi using SSD. Can you guide me?

Edit: just found this … will go through it and revert

No. I know nothing about that sorry.