docs: improve Synology NAS installation documentation clarity (#19993)

packaging/installer/methods/synology.md

@@ -1,62 +1,53 @@
 # Install Netdata on Synology
 
-> 💡 This document is maintained by Netdata's community, and may not be completely up-to-date. Please double-check the
-> details of the installation process, before proceeding.
->
-> You can help improve this document by
-> [submitting a PR](https://github.com/netdata/netdata/edit/master/packaging/installer/methods/synology.md)
-> with your recommended improvements or changes. Thank you!
+> This community-maintained guide may not reflect the latest changes.
+> Please verify the installation steps before proceeding.
+> 
+> Help improve this guide by [submitting a PR](https://github.com/netdata/netdata/edit/master/packaging/installer/methods/synology.md) with your suggestions.
+> Thank you!
 
-The good news is that our
-[one-line installation script](/packaging/installer/methods/kickstart.md)
-works fine if your NAS is one that uses the amd64 architecture. It
-will install the content into `/opt/netdata`, making future removal safe and simple.
+The [one-line installation script](/packaging/installer/methods/kickstart.md) works on Synology NAS devices with amd64 architecture. The script installs Netdata to `/opt/netdata/`.
 
-It your NAS is up-to-date,  running at least DSM 7.2.2, the latest kickstart script takes care of everything.
-You can start/stop the netdata service using the installed `systemd` and the service runs under the `netdata` user.
+For current Synology systems (DSM 7.2.2+), the kickstart script automatically handles the complete installation process. Netdata runs as the `netdata` user and can be managed through standard systemd commands.
 
 ## Older systems
 
-Older versions of DSM and the kickstart scripts did require some extra steps.
+<details>
+<summary>For DSM versions older than 7.2.2, additional configuration is required.</summary>
 
 ### Run as netdata user
 
-When Netdata is first installed, it will run as _root_. This may or may not be acceptable for you, and since other
-installations run it as the `netdata` user, you might wish to do the same. This requires some extra work:
+By default, Netdata runs as `root` on older systems. To run it as the netdata user instead:
 
-1. Create a group `netdata` via the Synology group interface. Give it no access to anything.
-2. Create a user `netdata` via the Synology user interface. Give it no access to anything and a random password. Assign
-    the user to the `netdata` group. Netdata will chuid to this user when running.
-3. Change ownership of the following directories:
-
-    ```sh
+1. Create a `netdata` group through the Synology control panel (no special access needed)
+2. Create a `netdata` user through the Synology control panel:
+    - Assign it to the netdata group
+    - Set a random password
+    - Grant no access permission
+3. Set correct ownership permissions:
+    ```bash
     chown -R root:netdata /opt/netdata/usr/share/netdata
     chown -R netdata:netdata /opt/netdata/var/lib/netdata /opt/netdata/var/cache/netdata
     chown -R netdata:root /opt/netdata/var/log/netdata
-    ```
-
+    ````
 4. Restart Netdata
-
     ```sh
     /etc/rc.netdata restart
     ```
 
-### Create startup script
+### Create a Startup Script
 
-Additionally, as of 2018/06/24, the Netdata installer doesn't recognize DSM as an operating system, so no init script is
-installed.
+Older DSM versions aren't automatically recognized during installation, so you'll need to create a startup script manually:
 
-DSM versions at the time where using upstart, so an upstart script was required.
-
-You'll have to do this manually:
-
-1. Add [this file](https://gist.github.com/oskapt/055d474d7bfef32c49469c1b53e8225f) as `/etc/rc.netdata`. Make it
-    executable with `chmod 0755 /etc/rc.netdata`.
-2. Add or edit `/etc/rc.local` and add a line calling `/etc/rc.netdata` to have it start on boot:
-
-    ```text
-    # Netdata startup
-    [ -x /etc/rc.netdata ] && /etc/rc.netdata start
+1. Create `/etc/rc.netdata` with [this script](https://gist.github.com/oskapt/055d474d7bfef32c49469c1b53e8225f).
+2. Make it executable:
+    ```sh
+    chmod 0755 /etc/rc.netdata
     ```
+3. Enable auto-start by adding to `/etc/rc.local`:
+   ```sh
+   # Netdata startup
+   [ -x /etc/rc.netdata ] && /etc/rc.netdata start
+   ```
 
-3. Make sure `/etc/rc.local` is executable: `chmod 0755 /etc/rc.local`.
+</details>