Help With Installation Seed Reterminal Raspberry Pie 4

Hey everyone,

I recently bought this raspberry Pi4 setup:
https://www.amazon.com/dp/B096ZXDRK9?psc=1&ref=ppx_yo2ov_dt_b_product_details

And I’ve been trying to follow this step by step:

https://wiki.seeedstudio.com/reTerminal-Home-Assistant/

I’m new to linux, but my first point of struggle was this:

In which the terminal would respond, “user ‘pi’ does not exist”

I moved on though, and made it to step 18, but now I get blocked by:

philtahu@raspberrypi:~ $ sudo docker run -d -p 9000:9000 --name portainer --restart always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest -H unix:///var/run/docker.sock
docker: Error response from daemon: Conflict. The container name “/portainer” is already in use by container “b60e64a40bc2c975afd52ad7879dc3dab040abf26ab48447f1d92443de12e35e”. You have to remove (or rename) that container to be able to reuse that name.
See ‘docker run --help’.
philtahu@raspberrypi:~ $

Does anyone have any ideas as to how to get me back on track with this installation?

Thanks a ton! And let me know if you need more info!

-Phil

First issue, you are running as user philtahu so run the command

sudo usermod -aG docker philtahu

Second problem

sudo docker rm portainer

I have tried this method and worked. https://wiki.seeedstudio.com/reterminal_frigate/