anchor.diff:  HEALTHCHECK CMD curl --fail "http://$(/bin/hostname -i | /usr/bin/awk '{ print $1 }'):${PORT:-8080}/users/sign_in" || exit 1
   
   CMD ["bundle","exec","puma","-C","config/puma.default.rb"]
  +
  
positive.code:     nodejs \
      tzdata
  
  
  ENV BUNDLER_VERSION=2.1.2
  COPY ["Gemfile", "Gemfile.lock", "/app/"]
  
  RUN apk add --no-cache --virtual build-dependencies build-base \
    && bundle config build.nokogiri --use-system-libraries \
    && bundle config set without 'test development no_docker' \
    && bundle install -j "$(getconf _NPROCESSORS_ONLN)" --retry 5 \
    && apk del build-dependencies
  
  COPY . /app
  
negative.code: FROM ruby:2.5.9-alpine
  LABEL maintainer="David Papp <david@ghostmonitor.com>"
  
  ENV BUNDLER_VERSION=2.1.4
  
  WORKDIR /app
  
  # throw errors if Gemfile has been modified since Gemfile.lock
  RUN echo "gem: --no-document" >> /etc/gemrc \
    && bundle config --global frozen 1 \
    && bundle config --global disable_shared_gems false \
    && gem update --system 2.7.4 \
    && gem install bundler --version $BUNDLER_VERSION \
    && apk add --no-cache \
      curl \
      less \
  