anchor.diff:  RUN apk add git \
       curl \
       gcc \
  +    g++ \
       make \
       perl \
       ncurses-dev \
       openssl-dev \
       coreutils \
       bsd-compat-headers \
  -    libc-dev 
  +    libc-dev \
  +    libstdc++
   
   ARG EMQX_DEPS_DEFAULT_VSN=develop
   ARG EMQX_NAME=emqx
  
positive.code: 
  ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
  
  CMD ["/usr/bin/start.sh"]
negative.code: COPY --from=builder /emqx_rel/_build/emqx*/rel/emqx /opt/emqx
  
  RUN ln -s /opt/emqx/bin/* /usr/local/bin/ 
  RUN apk add --no-cache ncurses-libs openssl sudo libstdc++
  
  WORKDIR /opt/emqx
  
  