Add note about serving ntp via dhcp and network manager

hardware/gps.md

@@ -90,6 +90,18 @@ chronyc tracking # Further details
 
 ```
 
+## NTP For Network
+
+To enable chrony on your lollipop as the ntp server for your local clients...
+
+``` bash
+
+cat > /etc/Networkmanager/dnsmasq-shared.d/ntp.conf <<EOF
+dhcp-options=option:ntp-server,172.30.0.1
+EOF
+
+```
+
 ## GPX Tracks
 
 ### NextCloud