feat(ddns-updater): add DDNS-Updater LXC container script

Add bare-metal installation script for qdm12/ddns-updater with web UI
on port 8000, supporting 60+ DNS providers.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ct/ddns-updater.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: reptil1990
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://github.com/qdm12/ddns-updater
+
+APP="DDNS-Updater"
+var_tags="${var_tags:-network}"
+var_cpu="${var_cpu:-1}"
+var_ram="${var_ram:-512}"
+var_disk="${var_disk:-2}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+  if [[ ! -d /opt/ddns-updater ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+  if check_for_gh_release "ddns-updater" "qdm12/ddns-updater"; then
+    msg_info "Stopping Service"
+    systemctl stop ddns-updater
+    msg_ok "Stopped Service"
+
+    msg_info "Backing up Data"
+    cp -r /opt/ddns-updater/data /opt/ddns-updater_data_backup
+    msg_ok "Backed up Data"
+
+    CLEAN_INSTALL=1 fetch_and_deploy_gh_release "ddns-updater" "qdm12/ddns-updater" "singlefile" "latest" "/opt/ddns-updater" "ddns-updater_*_linux_amd64"
+
+    msg_info "Restoring Data"
+    cp -r /opt/ddns-updater_data_backup/. /opt/ddns-updater/data/
+    rm -rf /opt/ddns-updater_data_backup
+    msg_ok "Restored Data"
+
+    msg_info "Starting Service"
+    systemctl start ddns-updater
+    msg_ok "Started Service"
+    msg_ok "Updated successfully!"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:8000${CL}"

ct/headers/ddns-updater

@@ -0,0 +1,6 @@
+    ____  ____  _   _______      __  __          __      __
+   / __ \/ __ \/ | / / ___/     / / / /___  ____/ /___ _/ /____  _____
+  / / / / / / /  |/ /\__ \_____/ / / / __ \/ __  / __ `/ __/ _ \/ ___/
+ / /_/ / /_/ / /|  /___/ /____/ /_/ / /_/ / /_/ / /_/ / /_/  __/ /
+/_____/_____/_/ |_//____/      \____/ .___/\__,_/\__,_/\__/\___/_/
+                                   /_/

install/ddns-updater-install.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: reptil1990
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://github.com/qdm12/ddns-updater
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+fetch_and_deploy_gh_release "ddns-updater" "qdm12/ddns-updater" "singlefile" "latest" "/opt/ddns-updater" "ddns-updater_*_linux_amd64"
+
+msg_info "Configuring DDNS-Updater"
+mkdir -p /opt/ddns-updater/data
+cat <<EOF >/opt/ddns-updater/data/config.json
+{
+  "settings": [
+    {
+      "provider": ""
+    }
+  ]
+}
+EOF
+msg_ok "Configured DDNS-Updater"
+
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/ddns-updater.service
+[Unit]
+Description=DDNS-Updater
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/opt/ddns-updater/ddns-updater
+Environment=DATADIR=/opt/ddns-updater/data
+Environment=LISTENING_ADDRESS=:8000
+Environment=LOG_LEVEL=info
+Environment=PERIOD=5m
+WorkingDirectory=/opt/ddns-updater
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable -q --now ddns-updater
+msg_ok "Created Service"
+
+motd_ssh
+customize
+cleanup_lxc

json/ddns-updater.json

@@ -0,0 +1,40 @@
+{
+    "name": "DDNS-Updater",
+    "slug": "ddns-updater",
+    "categories": [
+        4
+    ],
+    "date_created": "2026-04-06",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 8000,
+    "documentation": "https://github.com/qdm12/ddns-updater/wiki",
+    "website": "https://github.com/qdm12/ddns-updater",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/ddns-updater.webp",
+    "config_path": "/opt/ddns-updater/data/config.json",
+    "description": "Lightweight universal DDNS updater with web UI, supporting 60+ DNS providers including Cloudflare, Namecheap, GoDaddy, DuckDNS and more.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/ddns-updater.sh",
+            "resources": {
+                "cpu": 1,
+                "ram": 512,
+                "hdd": 2,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "Edit /opt/ddns-updater/data/config.json with your DNS provider settings before use.",
+            "type": "warning"
+        }
+    ]
+}