MT7628 Based Module - Image for SPI Flash

Hi. I'm new to OpenWRT/LEDE but not to embedded linux in general.

I've followed the ImageBuilder QuickStart and managed to build an Image for my MT7628 based board.
(Host machine is Ubuntu 16.04).

I have full access to the MT7628 module, including a console login, and can re-program the SPI EEPROM too.

My question is does the images I built using the guide include the bootloader and is it suitable just to program into the SPI Eeprom, or are there more steps to make the image suitable for programming in to the EEPROM.