FROM registry.fedoraproject.org/fedora:42
RUN set -eux; \
  microdnf -y install \
  rubygems rpmbuild bsdtar

RUN useradd -m -r -d /home/builder -s /bin/bash builder; \
  chown builder:builder /home/builder

USER builder
ENV PATH="/home/builder/bin:${PATH}"
WORKDIR /home/builder
RUN gem install fpm