anchor.diff:  # https://docs.microsoft.com/en-us/nuget/install-nuget-client-tools#macoslinux
   RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF &&\
     echo "deb https://download.mono-project.com/repo/ubuntu stable-xenial main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list &&\
  -  apt-get update &&\ 
  +  apt-get update &&\
     apt-get install -y mono-complete &&\
     curl -o /usr/local/bin/nuget.exe https://dist.nuget.org/win-x86-commandline/latest/nuget.exe &&\
     echo "alias nuget=\"mono /usr/local/bin/nuget.exe\"" >> ~/.bash_aliases
  
positive.code: #install java 8
  #http://askubuntu.com/questions/521145/how-to-install-oracle-java-on-ubuntu-14-04
  RUN cd /tmp && \
      wget --quiet --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u192-b12/750e1c8617c5452694857ad95c3ee230/jdk-8u192-linux-x64.tar.gz -O jdk-8.tgz && \
      tar xf /tmp/jdk-8.tgz && \
      mkdir -p /usr/lib/jvm && \
      mv jdk1.8.0_192 /usr/lib/jvm/oracle_jdk8 && \
      rm /tmp/jdk-8.tgz
  
  ENV J2SDKDIR=/usr/lib/jvm/oracle_jdk8
  
negative.code: 
  # Versioning
  ENV PIP_INSTALL_VERSION 10.0.1
  ENV GO_LANG_VERSION 1.11.4
  ENV MAVEN_VERSION 3.5.3
  ENV SBT_VERSION 1.1.1
  ENV GRADLE_VERSION 4.10
  