anchor.diff: -FROM node:9-alpine
  +FROM node:12-alpine
   
   # Installs latest Chromium (63) package.
   RUN apk update && apk upgrade && \
  
positive.code:     echo @edge http://nl.alpinelinux.org/alpine/edge/main >> /etc/apk/repositories && \
      apk add --no-cache \
        chromium@edge \
        nss@edge
  
  # Tell Puppeteer to skip installing Chrome. We'll be using the installed package.
  ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true
  
  RUN npm install puppeteer
  
  
negative.code: 
  # Add user so we don't need --no-sandbox.
  RUN addgroup -S pptruser && adduser -S -g pptruser pptruser \
      && mkdir -p /home/pptruser/Downloads /app \
      && chown -R pptruser:pptruser /home/pptruser \
      && chown -R pptruser:pptruser /app
  
  # Run everything after as non-privileged user.
  USER pptruser
  