-- Instalando docker en raspi [ref: https://phoenixnap.com/kb/docker-on-raspberry-pi]
-- Si haces todo bajo el usuario root, te aseguras que no hay problemas luego

# apt-get update && apt-get upgrade

# curl -fsSL https://get.docker.com -o get-docker.sh

# sh get-docker.sh

# usermod -G docker pi

-- Probar como corre
# docker run --rm -it python:slim bash
Unable to find image 'python:slim' locally
slim: Pulling from library/python
0c4667eb56da: Pull complete
e57d4e38ee8d: Pull complete
7d5b789db0fc: Pull complete
e35d2fe0eb45: Pull complete
454acc352828: Pull complete
Digest: sha256:6f4336219c228c28333d5174c447a06aaf360fcf9fce5809d0bc265afa414f7e
Status: Downloaded newer image for python:slim
root@6b380a2f9242:/# cat /etc/issue
issue      issue.net
root@6b380a2f9242:/# cat /etc/issue.net
Debian GNU/Linux 10 \n \l

# which python
/usr/local/bin/python

# python
Python 3.8.5 (default, Jul 22 2020, 15:51:38)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>