message: Updated Dockerfile.builder to include deps for luajit
diff: @@ -22,5 +22,8 @@ RUN mkdir -p /usr/share/man/man1
  RUN apt-get install -y openjdk-8-jdk-headless
  RUN apt-get install -y ant
  +# NWNX_LUA
  +RUN apt-get install -y libluajit-5.1-dev
  +
  # slim down the image again.
  RUN rm -r /var/lib/apt/lists /var/cache/apt
  