# Update system
sudo apt-get update
sudo apt-get upgrade -y

# Install dependencies
sudo apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

# Add Docker GPG key
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

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

# Install Docker
sudo apt-get update
sudo apt-get install -y docker-ce docker-ce-cli containerd.io

# Start Docker service
sudo systemctl start docker
sudo systemctl enable docker

# Verify installation
docker --version
docker run hello-world

# Pull Jenkins image
docker pull jenkins/jenkins:lts

# Create data directory
mkdir -p /var/jenkins_home
chown -R 1000:1000 /var/jenkins_home

# Start container
docker run -d \
  --name jenkins \
  -p 8080:8080 \
  -p 50000:50000 \
  -v /var/jenkins_home:/var/jenkins_home \
  jenkins/jenkins:lts