auto lo br0
iface lo inet loopback

auto ens33
iface ens33 inet manual

auto br0
iface br0 inet static
        address 192.168.1.69
        netmask 255.255.255.0
        network 192.168.1.1
        broadcast 192.168.1.255
        gateway 192.168.1.1
        bridge_ports ens33
        bridge_stp off
        bridge_fd 0
        bridge_maxwait 0
        dns-nameservers 1.1.1.1
...