anchor.diff:      ldconfig
   
   
  -# Set working directory and user
  -#
  -WORKDIR /opt/app-root/gwells
  -
   USER 1001
  
positive.code: 
  # Install and configure PROJ.4
  #
  WORKDIR /tmp
  RUN wget https://download.osgeo.org/proj/proj-5.2.0.tar.gz && \
      wget https://download.osgeo.org/proj/proj-datumgrid-north-america-1.1.tar.gz && \
      tar xzf proj-5.2.0.tar.gz && \
      cd proj-5.2.0/nad && \
  
negative.code: # External libraries required by Python GIS extensions (e.g. GeoDjango, GeoAlchemy)
  # Install and configure GEOS
  #
  
  RUN cd /tmp && wget https://download.osgeo.org/geos/geos-3.7.1.tar.bz2 && \
      tar xjf geos-3.7.1.tar.bz2 && \
      cd geos-3.7.1/ && \
      ./configure --prefix=/usr/local && \
  