anchor.diff: -FROM alpine:3.12 as builder
  -MAINTAINER github@erebe.eu
  +# Build Cache image
  +FROM alpine:3.12 as builder-cache
   
   RUN apk --no-cache add ca-certificates git ghc curl musl-dev gmp-dev zlib-dev zlib-static pcre-dev xz make upx
   RUN curl -sSL https://github.com/commercialhaskell/stack/releases/download/v2.1.3/stack-2.1.3-linux-x86_64-static.tar.gz | tar xvz && \
  
positive.code:     stack setup && \
      stack install --split-objs --ghc-options="-fPIC" --only-dependencies
  
  COPY . /mnt
  
  RUN echo '  ld-options: -static' >> wstunnel.cabal ; \
  
negative.code: 
  
  
  # Final Image
  FROM alpine:latest as runner
  MAINTAINER github@erebe.eu
  
  LABEL org.opencontainers.image.source https://github.com/erebe/server
  
  COPY --from=builder /root/.local/bin/wstunnel /
  RUN adduser -D abc && chmod +x /wstunnel
  