set -e

echo "🔍 Detecting OS..."

if [ -f /etc/os-release ]; then

. /etc/os-release

OS=$ID

echo "❌ Cannot detect OS. Exiting."

exit 1

echo "📦 Installing Docker on $OS..."

case "$OS" in

ubuntu|debian)

sudo apt-get update

sudo apt-get install -y ca-certificates curl gnupg lsb-release

sudo mkdir -p /etc/apt/keyrings

curl -fsSL https://download.docker.com/linux/$OS/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

echo \

"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/$OS \

$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

;;

centos|rhel)

sudo yum install -y yum-utils

sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

sudo yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

sudo systemctl start docker

sudo systemctl enable docker

;;

fedora)

sudo dnf -y install dnf-plugins-core

sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo

sudo dnf install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

sudo systemctl start docker

sudo systemctl enable docker

;;

arch)

sudo pacman -Sy --noconfirm docker

sudo systemctl start docker

sudo systemctl enable docker

;;

amzn)

sudo yum update -y

sudo amazon-linux-extras enable docker

sudo yum install -y docker

sudo systemctl start docker

sudo systemctl enable docker

;;

*)

echo "❌ Unsupported OS: $OS"

exit 1

;;

echo "✅ Docker installation complete!"

docker --version