1. In my project, my project sample is "ncs\v2.3.0\nrf\applications\nrf_desktop", this sample partition has only one bootloader and one app, without two app, so we can't OTA in the app, only can do OTA in the bootloader, I try to set the partion to 2 app partions, but the app is to big, on app is about 350KB, so we can't set 2 app partitions. but with the MCUboot, in the ncs bootloader, I not found the config about OTA by bluetooth, only withe serial/USB, but now we need the function to implement update the app by phone(do DFU from app), so MCUboot without the OTA configuration, I don't know how to config the MCUboot to support OTA, please help me to solve the problems, thanks.