Add QNAP installation instructions

.vuepress/docs-sidebar.js

@@ -53,6 +53,7 @@ module.exports = [
  'installation/openhabian',
  'installation/armbian',
  'installation/docker',
+ 'installation/qnap',
  'installation/synology',
  ['installation/security', 'Security'],
  ['installation/reverse-proxy', 'Reverse Proxy']

installation/qnap.md

@@ -0,0 +1,47 @@
+---
+layout: documentation
+title: QNAP NAS
+---
+
+:::
+
+# QNAP NAS
+
+[QNAP NAS](https://www.qnap.com/en) is a server solution for home and business, allowing the installation of additional packages.
+
+## Prerequisite - X86_64 or ARM64 platform
+
+You need to install openHAB from [here](https://www.myqnap.org/product/openhab/). It contains the latest stable OH version and Zulu17 JDK.
+
+The easiest way is to install the [MyQNAP repo](https://www.myqnap.org/install-the-repo/) and install openHAB from there so that updates are shown when published.
+
+QNAP NAS is based on Linux but it has limitations since it is not a full server. Therefore, it is recommended to use [WinSCP](https://winscp.net/eng/index.php) to access `userdata`, `addons` and `conf` folders, etc.
+
+### USB dongles
+
+USB dongles may or may not work as QTS (QNAP's operating system) might not include the necessary drivers. However, you can install [USB serial drivers](https://www.myqnap.org/product/usb-serial-drivers/) (preferrably from MyQNAP repo), maybe it will include missing drivers for the dongle. In case of doubt use network dongles instead.
+
+### Manual update
+
+If you decide to replace MyQNAP's distribution with an official openHAB one, for example to install another OH version or even a milestone, you can update openHAB manually:
+
+- Stop openhab (using "App Center")
+- Navigate to OpenHab3 folder (physical address may be /share/CACHEDEV3_DATA/.qpkg/OpenHab3 but this depends on your install)
+- Do a backup of OpenHab3 folder
+- delete folder runtime
+- inside folder userdata, delete folders cache, etc, and tmp
+- Download the desired openHAB version from github (zip file)
+- Unzip and copy to OpenHab3 folder (folders only, do not replace `start.sh`)
+- Give runtime/bin/karaf and runtime/bin/backup X permission (you may use F9 in WinSCP)
+- Edit /etc/config/qpkg.conf to specify the installed version (also update `Build` field to disable automatic updates)
+- Start openhab (using "App Center")
+
+### Other interesting packages provided by the MyQNAP repo
+
+- Mosquitto (needs configuration after install)
+- NodeJS v22 (required by zigbee2mqtt)
+- QGit (required to install / update zigbee2mqtt)
+- Node Red
+- FFMpeg (complement to `IP Camera` binding)
+- QPython312 (required by `HABApp`)
+- UniFi (complement to `UniFi` binding)