As stated in NXP-27988, to work around the --chown flag of the COPY instruction not working with Kaniko, we've needed to ad an extra
RUN chown -R 1000:0 $NUXEO_HOME
after the COPY instruction.
This adds a layer of the size of the distribution, ~ 200 Mo, which increases the image size in a significative way.
Either wait for Google to fix the issue or find a proper fix.