You can quickly install Docker environment on AlmaLinux 8. Just create a simple bash script with the following content:

vi /root/docker-install.sh

#!/bin/bash

dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
dnf install docker-ce docker-ce-cli containerd.io -y
systemctl start docker
systemctl enable docker
curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
docker-compose --version

Make the script executable:

chmod u+x /root/docker-install.sh

Run the script:

/root/docker-install.sh