Added a simple systemd service (#5)

Co-authored-by: Sanae <32604996+Sanae6@users.noreply.github.com>

README.md

@@ -20,6 +20,15 @@ dotnet run --project Server/Server.csproj -c Release
 ```
 If you ran `dotnet build` instead of `dotnet run`, you can find the binary at `Server/bin/net6.0/Release/Server.exe`
 
+## Running under systemd
+
+If you have systemd, you can use the existing systemd serivce.
+```shell
+cp smo.serivce /etc/systemd/system/smo.service
+# edit ExecStart to your path for the server executable and change WorkingDirectory to the server directory
+chmod +x filepath to the server executable
+systemctl enable --now smo.service
+```
 
 ## Commands
 
@@ -27,4 +36,4 @@ Run `help` to get what commands are available in the server console.
 Run the `loadsettings` command in the console to update the settings without restarting.
 Server address and port will require a server restart, but everything else should update when you run `loadsettings`.
 
-[//]: # (TODO: Document all commands, possibly rename them too.)
+[//]: # (TODO: Document all commands, possibly rename them too.)

smo.service

@@ -0,0 +1,19 @@
+[Unit]
+Description="Super Mario Odyssey Multiplayer Server"
+After=network.target
+StartLimitIntervalSec=0
+
+[Service]
+# Uncommnt User to run under a different user
+# User=user
+# change ExecStart to the path of the server file
+ExecStart="/home/user/SMOServer/Server"
+# change WorkingDirectory to the folder of your server
+WorkingDirectory=/home/user/SMOServer/
+# ensure the service restarts after crashing
+Restart=always
+# amount of time to wait before restarting the service
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target