anchor.diff:  
   # Stage: build assets
   FROM base as build
  -ARG BUILD_NUMBER
  -ARG GIT_REF
  +
  +ARG BUILD_NUMBER=1_0_0
  +ARG GIT_REF=not-available
   
   RUN apt-get update && \
       apt-get install -y make python g++ git
  
positive.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>"
  
  
negative.code: COPY . .
  RUN npm run build
  
  RUN export BUILD_NUMBER=${BUILD_NUMBER} && \
          export GIT_REF=${GIT_REF} && \
          npm run record-build-info
  
  RUN npm prune --no-audit --production
  
  