anchor.diff:  
   
   # Build image
  -FROM alpine:3.11
  +FROM alpine:3.12
   
   ENV FLASK_APP=/app/powerdnsadmin/__init__.py
   
  
positive.code: FROM alpine:3.11 AS builder
  LABEL maintainer="k@ndk.name"
  
  ARG BUILD_DEPENDENCIES="build-base \
  
negative.code:     FLASK_APP=/build/powerdnsadmin/__init__.py
  
  # Get dependencies
  RUN apk add --no-cache ${BUILD_DEPENDENCIES}
  
  WORKDIR /build
  
  