anchor.diff:    CGO_ENABLED=1 GOOS=linux go build -ldflags="-s -w" -o app && \
     cp app /app
   
  -FROM alpine:3.13
  +FROM alpine:3.14
   
   # Install all required tools
  -RUN apk add --update --no-cache optipng jpegoptim libwebp dav1d-dev libstdc++
  +RUN apk add --update --no-cache optipng jpegoptim libwebp dav1d-dev libstdc++ dssim
   RUN apk add rav1e-dev --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing
  -RUN apk add dssim --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community
   COPY --from=heif_build /heif_build/libheif/examples/heif-* /usr/bin/
   
   WORKDIR /root/
  
positive.code: # in default package.
  #
  
  FROM alpine:3.13 AS heif_build
  RUN apk add --update --no-cache git build-base libjpeg-turbo-dev libpng-dev dav1d-dev cmake
  RUN apk add rav1e-dev --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing
  
  
negative.code: ENV CXXFLAGS="-O2"
  RUN cd libheif && cmake . -DWITH_LIBDE265=OFF -DWITH_X265=OFF -DWITH_EXAMPLES=ON -DBUILD_SHARED_LIBS=OFF && make
  
  FROM golang:alpine3.14 AS build_piuma
  WORKDIR /app
  
  RUN apk add --update --no-cache git build-base pkgconfig
  