I bought and fired up my new HA Green. According to the installation documentation it should be running HA OS, but mine seems to be running HA Container, hence I am missing the ability to add apps etc. Why would that be? Can I change it to OS somehow? Why does it not have the OS as per the documentation?
I realized this when I wanted to add sonoff wifi switches and found some instructions how to do it that all referenced add-ons and apps that I were just not able to see in my HA. As I went down the rabbit hole of trying to install HACS etc none of the tips worked for me and I went back to the HA homepage and the installation documentation to double check and it should work out the box “plug and play” with HA OS and have Apps by default.
I purchased the "plug and play" zwave ZWA-2 Antenna and it's not so plug and play. Turns out it's only auto discovered by HAOS but my home assitant green seems to be running on a container, which now requires a weird JS web server to be set up. this is the nonsense i tried to tried to avoid by getting the plug and play Home Assistant green.
I am surprised that no one replied to your original post.
HAOS is the host OS, a minimal Linux appliance OS. The OS provides the container runtime (Docker/container). The Supervisor is a Docker container running on HAOS. The Supervisor:
Creates, starts, stops, and updates containers
Manages the Home Assistant Core
Manages Apps
Manages backups
Provides the API used by the UI
So, yes, you will see containers in HAOS bare-metal. You should be able to install apps and HACS out of the box.