Dnsmasq

To setup Dnsmasq you must be root ( sudo -s ) then install it with...

apt install dnsmasq

When using systemd-resolved, you'll get a service start failure during install, so must disable DNS forwarding....

cp -iv disable-forwarding.conf /etc/dnsmasq.d/

Once installed, we want dnsmasq to serve addresses...

You'll need to change the IP address range (in the file) to match your LAN configuration.

cp -iv dhcp-server.conf /etc/dnsmasq.d/

Static IP addresses can be set, copy the file dhcp-server-static.conf in this directory to /etc/dnsmasq.d/...

You'll need to add the MAC and IP addresses for your devices.

cp -iv dhcp-server-static.conf /etc/dnsmasq.d/

Finally restart dnsmasq and check for errors.

systemctl restart dnsmasq
systemctl status dnsmasq

You should now have a running dnsmasq service!