docs: add optional RustDesk remote support step to setup guide

README.md

@@ -305,6 +305,31 @@ Two shortcuts will appear on your desktop:
 
 > No username or path editing needed — the script automatically detects the current user's home folder.
 
+### Step 17 — Install RustDesk for remote support (optional)
+
+Lets you remotely access this PC for troubleshooting/support without needing SSH.
+
+```sh
+wget -q https://github.com/rustdesk/rustdesk/releases/latest/download/rustdesk-1.4.9-x86_64.deb -O /tmp/rustdesk.deb
+sudo apt install -y /tmp/rustdesk.deb
+```
+
+> Check [github.com/rustdesk/rustdesk/releases](https://github.com/rustdesk/rustdesk/releases) for the latest version number if the link above has moved on.
+
+Get this machine's RustDesk ID:
+
+```sh
+rustdesk --get-id
+```
+
+Set a permanent password for unattended access (skip this to require manual approval on each connection instead):
+
+```sh
+rustdesk --password YOUR_STRONG_PASSWORD
+```
+
+On the connecting device, install RustDesk and enter this machine's ID and password to connect.
+
 ---
 
 ## 📖 Developer Documentation