#!/usr/bin/env bash
set -euo pipefail

# Ensure script is run as root (required for apt + /etc)
if [[ "$EUID" -ne 0 ]]; then
  echo "Please run as root (or use sudo)." >&2
  exit 1
fi

# Add Docker's official GPG key:
apt update
apt install ca-certificates curl
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
tee /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/debian
Suites: $(. /etc/os-release && echo "$VERSION_CODENAME")
Components: stable
Signed-By: /etc/apt/keyrings/docker.asc
EOF


echo "Updating apt and installing Docker..."
apt update
apt install -y \
  docker-ce \
  docker-ce-cli \
  containerd.io \
  docker-buildx-plugin \
  docker-compose-plugin

echo "Docker installation complete."
docker --version