Compressed Docker Image (~14MiB) for Hugo Site Builder (v0.50)

Dockerfile

FROM "golang:1.13.5-alpine3.10" AS builder

ARG HUGO_VERSION="v0.61.0"
RUN    apk add --no-cache --virtual .build-deps gcc g++ git musl-dev upx \
    && git clone git://github.com/gohugoio/hugo.git \
    && cd hugo \
    && git checkout "${HUGO_VERSION}" \
    && go build -o "/tmp/hugo" -ldflags "-s -w" -tags "extended" \
    && upx --brute -o "/sbin/hugo" "/tmp/hugo" \
    && apk del .build-deps

FROM "alpine:3.10" AS clitool
MAINTAINER Zan Baldwin

# https://engineeringblog.yelp.com/2016/01/dumb-init-an-init-for-docker.html
RUN    apk add --no-cache --virtual .build-deps bash gcc git libc-dev make \
    && git clone "git://github.com/Yelp/dumb-init.git" /tmp/dumb-init \
    && (cd "/tmp/dumb-init"; git checkout "$(git describe --tags)"; make) \
    && mv "/tmp/dumb-init/dumb-init" "/sbin/dumb-init" \
    && rm -rf "/tmp/dumb-init" \
    && apk del .build-deps \
    && chmod +x "/sbin/dumb-init"
ENTRYPOINT [ "/sbin/dumb-init", "--" ]

COPY --from="builder" "/sbin/hugo" "/sbin/hugo"

# May have to install other dependencies later on for Sass, Image Processing, etc.
RUN apk add --no-cache bash
CMD [ "bash" ]