On the firmware download page, there’s a link you can expand to “customize image”. You can add more packages there and get a single image with everything includ

On the firmware download page, there’s a link you can expand to “customize image”. You can add more packages there and get a single image with everything included. You’ll still want to backup your config beforehand, as sometimes new releases need more space so the config partition is wiped out. But that’s still much easier to restore afterwards. Or you might also use the “attended sysupgrade” process which takes care of the firmware update directly from the device.