Currently JDK build copies LICENSE, ASSEMBLY_EXCEPTION, README, THIRD_PARTY_README files to the image.

When building a custom image, there is no license file to be included. One possibility is to have a jlink plugin to include these files in the image (or extract from a module).

Similarly, when building with JavaFX modules, the current Oracle JDK build contains THIRDPARTYLICENSEREADME-JAVAFX.txt.