#!/bin/bash
# Install Docker Engine + Compose plugin (Ubuntu)
set -euo pipefail

if command -v docker >/dev/null 2>&1; then
  echo "Docker already installed: $(docker --version)"
  exit 0
fi

apt-get update -qq
apt-get install -y -qq ca-certificates curl gnupg
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg

. /etc/os-release
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu ${VERSION_CODENAME} stable" \
  > /etc/apt/sources.list.d/docker.list

apt-get update -qq
apt-get install -y -qq docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
systemctl enable --now docker
docker --version
docker compose version