packaging: systemd unit hardening (#38109)

packaging/deb/systemd/grafana-server.service

@@ -26,6 +26,33 @@ ExecStart=/usr/sbin/grafana-server
 
 LimitNOFILE=10000
 TimeoutStopSec=20
+CapabilityBoundingSet=
+DeviceAllow=
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+PrivateUsers=true
+ProcSubset=pid
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectProc=invisible
+ProtectSystem=full
+RemoveIPC=true
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+SystemCallArchitectures=native
+SystemCallFilter=@system-service
+SystemCallFilter=~@privileged
+SystemCallFilter=~@resources
 UMask=0027
 
 [Install]