install-caddy.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 caddy &> /dev/null; then
    echo "Caddy is already installed."
    exit 1
fi

sudo apt-get update
sudo apt-get install -y debian-keyring debian-archive-keyring apt-transport-https curl

curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
sudo chmod o+r /usr/share/keyrings/caddy-stable-archive-keyring.gpg
sudo chmod o+r /etc/apt/sources.list.d/caddy-stable.list

sudo apt-get update
sudo apt-get install -y caddy