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