sudo apt update
sudo apt install bind9 bind9utils bind9-doc dnsutils

/etc/bind/named.conf.options
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
options {
    directory "/var/cache/bind";

    // Listen on all interfaces
    listen-on port 53 { any; };
    listen-on-v6 port 53 { ::1; };

    // Allow queries from your local network (adjust subnet as needed)
    allow-query { any; };

    // Disable recursion for authoritative-only server
    recursion no;

    dnssec-validation auto;

    auth-nxdomain no;
};

/etc/bind/named.conf.local
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
zone "lakefox.net" {
    type master;
    file "/etc/bind/zones/lakefox.net";
};

> Add one for each domain

sudo mkdir /etc/bind/zones

/etc/bind/zones/lakefox.net
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
$TTL    604800
@       IN      SOA     lakefox.net. admin.lakefox.net (
                  3     ; Serial
             604800     ; Refresh
              86400     ; Retry
            2419200     ; Expire
             604800 )   ; Negative Cache TTL

; Name servers
@       IN      NS      ns1
@       IN      NS      ns2

; A records
ns1     IN      A       24.49.140.127
ns2     IN      A       24.49.140.127;
@       IN      A       24.49.140.127

-> This is only for the NS
An example of a non NS record would look like this:

/etc/bind/zones/grimui.com
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
$TTL    604800
@       IN      SOA     grimui.com. admin.grimui.com (
                  3     ; Serial
             604800     ; Refresh
              86400     ; Retry
            2419200     ; Expire
             604800 )   ; Negative Cache TTL

; Name servers
@       IN      NS      ns1.lakefox.net.
@       IN      NS      ns2.lakefox.net.

; A records
@       IN      A       24.49.140.127

> The name servers, if they are not relative, must end in a "." and have a ending newline

To test a DNS config:
sudo named-checkzone lakefox.net /etc/bind/zones/lakefox.net

Restart bind9 after each update:
sudo systemctl restart bind9