imply.io Docker Dockerfile update

FROM ubuntu:18.04

# Prepare OS
COPY setup-os.sh /root
RUN /root/setup-os.sh

# Copy package from build directory
ARG implyversion
COPY ["imply-$implyversion", "/opt/imply-${implyversion}"]
RUN mkdir -p /mnt/imply/var && ln -snf /mnt/imply/var /opt/imply-${implyversion}/var
RUN ln -snf /opt/imply-${implyversion} /opt/imply

EXPOSE 1527 2181 8081 8082 8083 8090 8091 8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8200 9095

WORKDIR /opt/imply-$implyversion

CMD ["bin/supervise", "-c", "conf/supervise/quickstart.conf"]