feat: add domain and install scripts for apps

ghost/install.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+APP_NAME="ghost"
+APP_DIR="/var/excloud/apps"
+SCRIPT_DIR="/var/excloud/scripts"
+APP_UPSTREAM_PORT="${EXC_APP_UPSTREAM_PORT:-2368}"
+REPO_URL="https://github.com/TryGhost/ghost-docker.git"
+
+mkdir -p "${APP_DIR}"
+mkdir -p "${SCRIPT_DIR}"
+
+DOMAIN="${1}"
+
+if [ -z "${DOMAIN}" ]; then
+  echo "Error: URL argument is required. Example:" >&2
+  echo "install.sh sub.example.com" >&2
+  exit 1
+fi
+
+GHOST_DIR="${APP_DIR}/${APP_NAME}"
+
+apt-get install -y caddy git openssl
+
+if [ ! -d "${GHOST_DIR}/.git" ]; then
+  git clone "${REPO_URL}" "${GHOST_DIR}"
+fi
+
+bash "${SCRIPT_DIR}/domain.sh" "${DOMAIN}"