subnet {{ dhcp_subnet }} netmask {{ dhcp_netmask }} {
    range {{ dhcp_start }} {{ dhcp_end }};
    option routers {{ router_ip }};
    option domain-name-servers 8.8.8.8, 8.8.4.4;
    next-server {{ server_ip }}; # IP of your PXE server
    interface {{ listen_interface }};
    filename "debian-installer/amd64/grubx64.efi";
}