Static binary Elm docker image (based on elm/compiler PR #2044 Dockerfile)

Dockerfile

# Based on https://gist.github.com/rlefevre/1523f47e75310e28eee243c9c5651ac9
#
# Build Linux x64 binary from elm compiler top-level directory:
# $ docker build -t elm -f installers/linux/Dockerfile .
#
# Retrieve elm Linux binary:
# $ docker cp $(docker create elm):/elm DESTINATION_DIRECTORY
#
# Delete docker elm image:
# $ docker rmi elm
#
# Display all images:
# $ docker images -a
#
# Delete all unused docker images:
# $ docker system prune -a

FROM alpine:3.11 AS builder

# Install required packages
RUN apk add --no-cache ghc cabal wget musl-dev zlib-dev zlib-static ncurses-dev ncurses-static

# Import source code
WORKDIR /elm
COPY . .
RUN rm worker/elm.cabal

# Build elm binary
RUN cabal new-update
RUN cabal new-build --ghc-option=-optl=-static --ghc-option=-split-sections
RUN strip -s ./dist-newstyle/build/x86_64-linux/ghc-*/elm-*/x/elm/build/elm/elm

FROM scratch
COPY --from=builder /elm/dist-newstyle/build/x86_64-linux/ghc-*/elm-*/x/elm/build/elm/elm /