contrib/packaging/docker/fedora28

rust-discovery: read the index from a repo passed at init

This makes the API of the Rust PartialDiscovery object now
the same (or rather a subset) of the Python object, hence
easier to control through module policy down the road.

Differential Revision: https://phab.mercurial-scm.org/D6517

FROM fedora:28

RUN groupadd -g 1000 build && \
    useradd -u 1000 -g 1000 -s /bin/bash -d /build -m build

RUN dnf install -y \
	gcc \
	gettext \
	make \
	python-devel \
	python-docutils \
	rpm-build

# For creating repo meta data
RUN dnf install -y createrepo