docker_install.sh

#!/bin/bash
set -e

echo "Updating package index..."
sudo apt-get update -y

echo "Installing prerequisites..."
sudo apt-get install -y \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

echo "Adding Docker’s official GPG key..."
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

echo "Setting up Docker repository..."
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

echo "Updating package index (with Docker repo)..."
sudo apt-get update -y

echo "Installing Docker Engine, CLI, containerd..."
sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

echo "Enabling and starting Docker service..."
sudo systemctl enable docker
sudo systemctl start docker

echo "Adding current user ($USER) to docker group..."
sudo usermod -aG docker $USER

echo "Installation complete. You may need to log out and log back in for group changes to take effect."
docker --version