install-docker.sh

#!/bin/bash

if [ ! -f /etc/os-release ] || ! grep -qi "debian" /etc/os-release; then
    echo "This script is only for Debian-based systems."
    exit 1
fi

if command -v docker &> /dev/null; then
    echo "Docker is already installed."
    exit 1
fi

sudo apt-get update
sudo apt-get install -y ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

echo \
    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
    $(. /etc/os-release && echo "$VERSION_CODENAME") 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

sudo systemctl enable docker
sudo systemctl start docker
sudo groupadd docker
sudo usermod -aG docker $USER