add script for synology and iOS install part

src/pages/how-to/installation.mdx

@@ -182,6 +182,26 @@ brew unlink netbird
 curl -fsSL https://pkgs.netbird.io/install.sh | sh
 ```
 
+For NetBird to work on Synology after a reboot, you need to run this scrip every time you reboot your NAS. To automate this process, you can create a scheduled task in the Synology DSM.
+```bash
+#!/bin/sh
+
+# Create the necessary file structure for /dev/net/tun
+if ( [ ! -c /dev/net/tun ] ); then
+  if ( [ ! -d /dev/net ] ); then
+    mkdir -m 755 /dev/net
+  fi
+  mknod /dev/net/tun c 10 200
+  chmod 0755 /dev/net/tun
+fi
+
+# Load the tun module if not already loaded
+if ( !(lsmod | grep -q "^tun\s") ); then
+  insmod /lib/modules/tun.ko
+fi
+```
+
+
 ### Android
 
 NetBird has an official Android application that you can download at Google Play Store:
@@ -193,7 +213,15 @@ NetBird has an official Android application that you can download at Google Play
 
 </p>
 
+### iOS
+
+NetBird has an official iOS application that you can download from the App Store:
 
+<p>
+    <a href="https://apps.apple.com/de/app/netbird-p2p-vpn/id6469329339?l=en-GB" target="_blank">
+        <img src="/docs-static/img/how-to-guides/app-store-badge.svg" alt="appstore" className="imagewrapper" style={{ padding: '30px' }}/>
+    </a>
+</p>
 
 ### Binary Install
 **Installation from binary (CLI only)**