Add mono-less service file and quick navigation

Systemd-service.md

@@ -1,3 +1,8 @@
+- [Using mono](#using-mono)
+- [Not using mono](#not-using-mono)
+
+## Using mono
+
 To automatically start Jackett as a systemd service you have to create create the following service file (e.g. /etc/systemd/system/jackett.service):
 
 ```ini
@@ -67,4 +72,28 @@ Like the very first script you have to edit:
 `User`
 `Group`
 PATH of `ExecStart` and `WorkingDirectory`
-Then if you want to use more or less memory you have to edit the `MemoryMax` value
+Then if you want to use more or less memory you have to edit the `MemoryMax` value
+
+## Not using mono
+
+If you're not using mono you may use this service file.
+
+> This service file is following up [issue #11566](https://github.com/Jackett/Jackett/issues/11566) in which Jackett was not able to update properly. It is unclear if the changes made to this mono-less service file actually fixed the issue or not, but it remains a good starting point if you're setting up Jackett with systemd.
+
+```
+[Unit]
+Description=Jackett Daemon
+After=network.target
+
+[Service]
+SyslogIdentifier=jackett
+Restart=on-failure
+Type=simple
+User=jackett
+Group=jackett
+WorkingDirectory=/opt/Jackett
+ExecStart=/bin/sh "/opt/Jackett/jackett_launcher.sh"
+
+[Install]
+WantedBy=multi-user.target
+```