chore: Notes for running as system service (#1252)

* Note for running as system service
Note for running as system service

* Additional detailing of linux service.

* Added darkflame.service file

changed readme to reference new file

README.md

@@ -224,6 +224,44 @@ sudo setcap 'cap_net_bind_service=+ep' AuthServer
 ```
 and then go to `build/masterconfig.ini` and change `use_sudo_auth` to 0.
 
+### Linux Service
+If you are running this on a linux based system, it will use your terminal to run the program interactively, preventing you using it for other tasks and requiring it to be open to run the server.  
+_Note: You could use screen or tmux instead for virtual terminals_  
+To run the server non-interactively, we can use a systemctl service by copying the following file:  
+```shell
+cp ./systemd.example /etc/systemd/system/darkflame.service
+```  
+
+Make sure to edit the file in `/etc/systemd/system/darkflame.service` and change the:  
+- `User` and `Group` to the user that runs the darkflame server.  
+- `ExecPath` to the full file path of the server executable.  
+
+To register, enable and start the service use the following commands:
+
+- Reload the systemd manager configuration to make it aware of the new service file:
+```shell
+systemctl daemon-reload
+```
+- Start the service:
+```shell
+systemctl start darkflame.service
+```
+- Enable OR disable the service to start on boot using:
+```shell
+systemctl enable darkflame.service
+systemctl disable darkflame.service
+```
+- Verify that the service is running without errors:
+```shell
+systemctl status darkflame.service
+```
+- You can also restart, stop, or check the logs of the service using journalctl
+```shell
+systemctl restart darkflame.service
+systemctl stop darkflame.service
+journalctl -xeu darkflame.service
+```
+
 ### First admin user
 Run `MasterServer -a` to get prompted to create an admin account. This method is only intended for the system administrator as a means to get started, do NOT use this method to create accounts for other users!
 

systemd.example

@@ -0,0 +1,19 @@
+[Unit]
+# Description of the service.
+Description=Darkflame LEGO Universe Server
+# Wait for network to start first before starting this service.
+After=network.target
+
+[Service]
+Type=simple
+# Services should have their own, dedicated, user account.
+# The specific user that our service will run as, you can find your current user by issuing `id -un`
+User=darkflame
+# The specific group that our service will run as, you can find your current primary group by issuing `id -gn`
+Group=darkflame
+# Full Path to the darkflame server process
+ExecStart=/PATH/TO/DarkflameServer/build/MasterServer
+
+[Install]
+# Define the behavior if the service is enabled or disabled to automatically started at boot.
+WantedBy=multi-user.target