After you build the image, you need to configure the image before run at device:
- Select one of network configuration in
/boot/img-builder/interfaces.d/(see more in Network); - Setup configuration of your Wi-Fi network at
/boot/img-builder/wpa_supplicant.conf(only for Wi-Fi client); - Setup OpenVPN configuration at
/boot/img-builder/openvpn.ovpn(it will work only if you update this file).