openwrt/target/imagebuilder/files
..
Makefile
README.md
repositories.conf

./packages folder

Add .ipk packages to this folder will allow the ImageBuilder to install them.

For more complex setups consider adding a custom feed containing packages.

src custom file:///path/to/packages

Whenever the ImageBuilder builds a firmware image this folder will be reloaded and a new package index created. In case signature checks are enabled the ./packages/Packages index will be signed with a locally generated key pair.