FROM debian:9.11
RUN groupadd -g 10000 bar
RUN useradd -c "Foo user" -u 10000 -g 10000 -m foo


# no passwd file
FROM scratch

# without a USER Set
WORKDIR /workdir/wo/user

USER 9999
WORKDIR /workdir/w/uid

USER 9999:9999
WORKDIR /workdir/w/uid_gid

USER 0
WORKDIR /workdir/w/root_uid

USER root
WORKDIR /workdir/w/root_username

# with passwd file
COPY --from=0 /etc/passwd /etc/passwd
COPY --from=0 /etc/group /etc/group

USER foo
WORKDIR /workdir/w/foo_username

USER foo:10000
WORKDIR /workdir/w/foo_username_gid

USER 10000
WORKDIR /workdir/w/foo_uid

USER 10000:10000
WORKDIR /workdir/w/foo_uid_gid

USER 10000:bar
WORKDIR /workdir/w/foo_uid_groupname