[Unit]
Description=Send notification on machine shutdown
RefuseManualStop=yes

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStop=/usr/bin/curl -d '%H is going down' https://ntfy.pyrocufflink.blue/alerts
DynamicUser=yes
CapabilityBoundingSet=
DeviceAllow=
DevicePolicy=closed
LockPersonality=yes
MemoryDenyWriteExecute=yes
NoNewPrivileges=yes
PrivateDevices=yes
PrivateUsers=yes
PrivateTmp=yes
ProcSubset=pid
ProtectClock=yes
ProtectControlGroups=yes
ProtectHome=yes
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectProc=invisible
ProtectSystem=strict
RestrictAddressFamilies=AF_INET AF_INET6
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
SystemCallArchitectures=native
SystemCallFilter=@system-service
SystemCallFilter=~@privileged @resources

[Install]
WantedBy=multi-user.target