Add borgbackup server

Use alpine 3.23

install/alpine-borgbackup-server-install.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: Sander Koenders (sanderkoenders)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://www.borgbackup.org/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing BorgBackup"
+$STD apk add --no-cache borgbackup openssh
+$STD rc-update add sshd
+$STD rc-service sshd start
+msg_ok "Installed BorgBackup"
+
+motd_ssh
+customize
+cleanup_lxc