Docker Raspberry OS buster

Update system:

sudo apt-get update && sudo apt-get upgrade

Donwload installation script:

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

Install docker:

sudo sh get-docker.sh

Run PostgreSQL 12:

docker run --name pg12 -t \
-e POSTGRES_PASSWORD="zabbix" \
-e POSTGRES_DB="dummy_db" \
-p 5432:5432 \
-d postgres:12-alpine

Run CentOS7:

docker run --name centos7 -t -i -d centos:centos7

ARM docker images: https://hub.docker.com/u/arm32v7
https://phoenixnap.com/kb/docker-on-raspberry-pi