FROM debian:stretch
ENV DEBIAN_FRONTEND noninteractive

RUN apt-get update \
    && apt-get --no-install-suggests --no-install-recommends install -y \
        lua5.2 \
        liblua5.2 \
        lua-sec \
        lua-event \
        lua-zlib \
        lua-dbi-postgresql \
        lua-bitop \
        lua-socket \
        lua-expat \
        lua-filesystem \
        wget \
        gnupg2 \
        openssl \
        ca-certificates \
        apt-transport-https \
    && apt-get autoremove && apt-get clean \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN wget https://prosody.im/files/prosody-debian-packages.key \
    && apt-key add prosody-debian-packages.key \
    && echo "deb https://packages.prosody.im/debian stretch main" \
       > /etc/apt/sources.list.d/prosody.list \
    && apt-get update && apt-get install -y prosody