https://github.com/tfausak/tfausak.github.io/issues/134

Dockerfile

FROM debian:stable-slim as build

  RUN apt-get update && apt-get install --assume-yes \
    gcc \
    libgmp-dev \
    make \
    wget \
    xz-utils \
    zlib1g-dev

  WORKDIR /root/stack
  RUN wget https://github.com/commercialhaskell/stack/releases/download/v1.5.1/stack-1.5.1-linux-x86_64-static.tar.gz
  RUN tar --extract --file stack-*-linux-x86_64-static.tar.gz
  RUN cp stack-*-linux-x86_64-static/stack /usr/local/bin

  WORKDIR /root/project
  COPY stack.yaml .
  RUN stack setup

  COPY package.yaml .
  RUN stack build --only-dependencies

  COPY . .
  RUN stack install --ghc-options -optl-static

FROM scratch

  COPY --from=build /root/.local/bin/example /
  ENV PORT 80
  EXPOSE $PORT
  CMD ["/example"]

example.hs

import qualified Data.Text as Text
import qualified Data.Text.IO as Text

main :: IO ()
main = Text.putStrLn (Text.pack "Hello, world!")

package.yaml

name: example
version: 1.0.0
executables:
  example:
    main: example.hs
    dependencies: [base, text]

stack.yaml

resolver: lts-9.0