Add systemd timer

PKGBUILD

@@ -32,4 +32,6 @@ package()
 {
     cd ${srcdir}/${_pkgname}
     install -Dm755 ${_pkgname} ${pkgdir}/usr/bin/${_pkgname}
+    install -Dm644 ${_pkgname}.service ${pkgdir}/usr/lib/systemd/user/${_pkgname}.service
+    install -Dm644 ${_pkgname}.timer ${pkgdir}/usr/lib/systemd/user/${_pkgname}.timer
 }

update-notify.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Notify if updates are available
+
+[Service]
+ExecStart=/usr/bin/update-notify 30
+Type=simple
+Restart=no

update-notify.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Run update-notify every 6 hours
+
+[Timer]
+OnBootSec=5min
+OnUnitActiveSec=6h
+Persistent=true
+
+[Install]
+WantedBy=timers.target