If you would like to be sure, that you have generated all the files needed to manufacture and assemble your board, this video can be useful for you.
Here are the links from this video:
– Board Filename Generator:
https://www.fedevel.com/academy/tools/board-manufacturing-filename-generator/
– iMX6 Rex Open source projects:
http://www.imx6rex.com/
– 28Pins Open source project:
http://www.28pins.com/
– FEDEVEL Directory template github:
https://github.com/FEDEVEL/fedevel-project-directory-template
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