FROM debian:stretch-slim

ARG JITSI_RELEASE=unstable

ADD https://github.com/just-containers/s6-overlay/releases/download/v1.21.2.2/s6-overlay-amd64.tar.gz /tmp/s6-overlay.tar.gz
ADD https://download.jitsi.org/jitsi-key.gpg.key /tmp/jitsi.key

COPY rootfs /

RUN \
	tar xfz /tmp/s6-overlay.tar.gz -C / && \
	rm -f /tmp/*.tar.gz && \
	apt-dpkg-wrap apt-get update && \
	apt-dpkg-wrap apt-get install -y apt-transport-https ca-certificates gnupg && \
	apt-key add /tmp/jitsi.key && \
	rm -f /tmp/jitsi.key && \
	echo "deb https://download.jitsi.org $JITSI_RELEASE/" > /etc/apt/sources.list.d/jitsi.list && \
	apt-dpkg-wrap apt-get update && \
	apt-dpkg-wrap apt-get dist-upgrade -y && \
	apt-dpkg-wrap apt-get autoremove -y --purge gnupg && \
	apt-cleanup

ENTRYPOINT [ "/init" ]