anchor.diff:  # Stage: base image
  -ARG BUILD_NUMBER
  -ARG GIT_REF
  +ARG BUILD_NUMBER=1_0_0
  +ARG GIT_REF=not-available
   
  -FROM node:16.13-bullseye-slim as base
  +FROM node:16.14-bullseye-slim as base
   
   LABEL maintainer="HMPPS Digital Studio <info@digital.justice.gov.uk>"
   
  
positive.code: 
  WORKDIR /app
  
  RUN npm i -g npm@8
  
  # Stage: build assets
  FROM base as build
  
negative.code: ARG GIT_REF
  
  RUN apt-get update && \
      apt-get install -y make python g++ git
  
  COPY package*.json ./
  