added systemd instructions

setup.md

@@ -81,3 +81,37 @@
     <li>If you change your repository name, make sure to change the url on lines 161-168 of views.py to reflect the change</li>
     <li>If you are running on http instead of https, make sure to make the change on line 70 of views.py</li>
 </ul>
+
+## To autostart the server on boot, you can set up a systemd service called rdgen.service
+
+replace user, group, and port if you need to  
+replace /opt with wherever you have installed rdgen  
+save the following file as /etc/systed/system/rdgen.service  
+```
+[Unit]
+Description=Rustdesk Client Generator
+[Service]
+Type=simple
+LimitNOFILE=1000000
+ExecStart=/usr/bin/python3 /opt/rdgen/manage.py runserver 0.0.0.0:8000
+WorkingDirectory=/opt/rdgen/
+User=root
+Group=root
+Restart=always
+StandardOutput=file:/var/log/rdgen.log
+StandardError=file:/var/log/rdgen.error
+# Restart service after 10 seconds if node service crashes
+RestartSec=10
+[Install]
+WantedBy=multi-user.target
+```
+
+then run this to enable autostarting the service on boot, and then start it manually this time:
+```
+sudo systemctl enable rdgen.service
+sudo systemctl start rdgen.service
+```
+and to get the status of the server, run:
+```
+sudo systemctl status rdgen.service
+```