anchor.diff:  #   - build-essential: To ensure certain gems can be compiled
   #   - nodejs: Compile assets
   RUN set -x; \
  -  apt-get update \
  -  && apt-get install -y --no-install-recommends \
  +  apt update \
  +  && apt install -y --no-install-recommends \
     openssh-server \
     zlib1g-dev \
     build-essential \
  
positive.code: # Adding project files
  COPY . .
  
  RUN set -x; \
    SKIP_MONGO_CLIENT='true' bundle exec rake assets:precompile
  
  EXPOSE 8080
  
  CMD bundle exec unicorn -c config/unicorn.rb
  
negative.code:   libmagickwand-dev
  
  # Set an environment variable where the Rails app is installed to inside of Docker image
  ENV DIR_ROOT /var/www
  ENV RAILS_ROOT $DIR_ROOT/cenit
  RUN mkdir -p $RAILS_ROOT
  
  RUN mkdir -p $DIR_ROOT/shared/log
  RUN mkdir -p $DIR_ROOT/shared/pids
  RUN mkdir -p $DIR_ROOT/shared/sockets
  
  # Set working directory
  WORKDIR $RAILS_ROOT
  