Updated administration documentation

docs/Resources/example_systemd.service

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+[Unit]
+Description=HAM .NET Application
+After=network.target
+
+[Service]
+Type=simple
+NotifyAccess=all
+Restart=always
+RestartSec=10
+
+# Working directory
+WorkingDirectory=/var/www/HAM
+
+# Application settings
+ExecStart=/usr/bin/dotnet /var/www/HAM/Berufsschule_HAM.dll
+ExecReload=/bin/kill -HUP $MAINPID
+#TimeoutStopSec=30
+#TimeoutStartSec=60
+
+# Environment variables (uncomment and modify as needed)
+Environment=DOTNET_ENVIRONMENT=Production
+
+# Security settings
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=ham
+
+[Install]
+WantedBy=multi-user.target