add GWN Manager script

install/gwn-manager-install.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: Slaviša Arežina (tremor021)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://www.grandstream.com/products/networking-solutions/wi-fi-management/product/gwn-manager
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt install -y \
+    xfonts-utils \
+    fontconfig
+msg_ok "Installed Dependencies"
+
+msg_info "Setting up GWN Manager"
+RELEASE=$(curl -s https://www.grandstream.com/support/tools#gwntools \
+  | grep -oP 'https://firmware\.grandstream\.com/GWN_Manager-[^"]+-Ubuntu\.tar\.gz')
+download_with_progress "$RELEASE" "/tmp/gwnmanager.tar.gz"
+cd /tmp
+tar -xzf gwnmanager.tar.gz --strip-components=1
+$STD ./install
+msg_ok "Setup GWN Manager"
+
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/gwnmanager.service
+[Unit]
+Description=GWN Manager
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/gwn
+ExecStart=/gwn/gwn start
+Restart=on-failure
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable -q --now gwnmanager
+msg_ok "Created Service"
+
+motd_ssh
+customize
+cleanup_lxc