anchor.diff:  ##
   ## run example via:
   ##
  +##
  +## 1. threadripper 1950x
   ## docker run --cpus="16.0" --memory="32g" --shm-size="16g" latexml-plugin-cortex:1.0 latexml_harness 131.188.48.209
  +##
  +## 2. monster config style:
  +## docker run --cpus="72.0" --memory="96g" --shm-size="64g" latexml-plugin-cortex:1.0 latexml_harness 131.188.48.209
   
   FROM ubuntu:18.04
   ENV TZ=America/New_York
  
positive.code:   libtest-weaken-perl \
    libzmq3-dev
  
  # Install LaTeXML-Plugin-Cortex's master branch via cpanminus
  RUN mkdir -p /opt/latexml_plugin_cortex
  WORKDIR /opt/latexml_plugin_cortex
  
negative.code: RUN export HARNESS_OPTIONS=j$(grep -c ^processor /proc/cpuinfo):c
  RUN mkdir -p /opt/latexml
  WORKDIR /opt/latexml
  RUN cpanm --notest --verbose --skip-installed https://github.com/brucemiller/LaTeXML/tarball/master
  
  # libunix-processors-perl \ # only in 20.04 and newer
  # cortex worker dependencies
  