anchor.diff: -FROM instructure/ruby-passenger:2.4
  -#FROM instructure/ruby-passenger:2.4
  +FROM instructure/ruby-passenger:2.4-xenial
   ##FROM instructure/canvas-lms:stable
   
   LABEL maintainer="Ray Pulsipher <ray@cmagic.biz>"
   LABEL description="Canvas LMS by Instructure - Image for Open Prison Education"
   LABEL vendor="openprisoneducation.com"
  -LABEL version="0.8"
  +LABEL version="0.9"
   
   # ope-canvas - Canvas LMS System
   # Build with docker build -t ope-canvas .
  
positive.code: ENV NGINX_MAX_UPLOAD_SIZE 50g
  #ENV YARN_VERSION 1.3.2-1
  #ENV YARN_VERSION 1.7.0-1
  ENV YARN_VERSION 1.9.4-1
  #ENV YARN_VERSION 1.10.1-1
  ENV CANVAS_RELEASE release/2018-10-27.23
  #ENV CANVAS_RELEASE release/2018-11-17.24
  
  # Work around github.com/zertosh/v8-compile-cache/issues/2
  
negative.code: 
  RUN if [ -e /var/lib/gems/$RUBY_MAJOR.0/gems/bundler-* ]; then BUNDLER_INSTALL="-i /var/lib/gems/$RUBY_MAJOR.0"; fi \
    && gem uninstall --all --ignore-dependencies --force $BUNDLER_INSTALL bundler \
    && gem install bundler --no-document -v 1.16.1 \
    && find $GEM_HOME ! -user docker | xargs chown docker:docker
  
  # Make sure this runs during build, will also run at at startup later
  