Inform 7 Dockerfile

i7.Dockerfile

FROM alpine:3.3

ENV INFORM_RELEASE 6M62

RUN set -ex \
  && apk add --no-cache --virtual .fetch-deps curl \
  && apk add --no-cache --virtual .run-deps perl util-linux \
  && curl http://inform7.com/download/content/${INFORM_RELEASE}/I7_${INFORM_RELEASE}_Linux_all.tar.gz \
     > /inform.tar.gz \
  && apk del .fetch-deps \
  && tar -zxvf /inform.tar.gz \
  && cd /inform7-${INFORM_RELEASE}/ \
  && ./install-inform7.sh \
  && rm -rf /inform.tar.gz /inform7-${INFORM_RELEASE}

CMD ["sh", "i7"]