Hi Kenneth,
I’m not a specialist in Home Assistant, but first of all please consider (as referred in my tutorial) that this is to install Home Assistant CORE. That said, when you use docker, containers create internal folder structure which is not directly visible from shell. To see what you have inside the container folders you have 2 options:

• Create a Volume (option -v): this is a common practice to map internal folder from your container to you host (Raspberry PI OS structure)
• Create a shell session inside the container (command docker exec -it homeAssProd bash): this allows you to have an interactive shell inside the container

If the custom_components is a default folder, you will find it inside the container.
If it is required for your customizations, you should map it into a dedicated volume (as done in my tutorial for config folder with the “-v /home/pi/homeAssProd:/config“option).
Probably, if you need to create it you have to check that your configuration.yaml file is configured properly. Anyway, I suggest to ask support from Home Assistant forums, which are more specialized in Home Assistant internal stuff.

Dear Peppe8o
wish you a merry Christmas
Thanks for your prompt response. i think even without supervisor tab i manage to get some add-ons with HA core version. i wanted to integrate MQTT broker and i did after referring few online tutorials. but none of them are clear as your instructions.
i’m trying to find where home assistant configuration.yaml located. i can find find file with same name at homeAssProd directory. but it doesn’t look like usual yaml file.
i want to get duckDNS and integrate with home assistant. i couldn’t find any tutorial on this written for home assistant core version.
it’s appreciated if you can find sometime to work on this. many thanks again and keep up your good job

Thanking to your comment, I’ve discovered that docker installation for home-assistant (beside on which platform is installed) is a core installation. Supervisor tab is available only on complete and manual installation (https://www.home-assistant.io/docs/installation/raspberry-pi/). Updated post title according.

Thank you