Include a sample service file

board-server/README.md

@@ -48,3 +48,17 @@ socket.addEventListener('message', (event) => {
     console.log('Message from server', JSON.parse(event.data));
 });
 ```
+
+## Run as Linux service
+
+```
+[Unit]
+Description=Scrabble with numbers - WebSocket Server
+After=network.target
+
+[Service]
+ExecStart=board-server '0.0.0.0:21110'
+
+[Install]
+WantedBy=multi-user.target
+```