FEAT: Introducing a much slimmer image (23.3MB instead of 75.3MB) for node:10-alpine-slim

[pascalandy]

Hi folks,

I propose we create a node-slim for alpine. I was optimized my Dockerfile for Ghost and I found a way to not include yarn, npm, npx. I also compressed node using upx.

Here is the result.

size

devmtl/10.16-alpine-slim    latest              e5efb0afa59d        6 seconds ago       23.3MB
node                        10.16-alpine        9dfa73010b19        5 days ago          75.3MB

The beauty here is that it's all based on the official node:10.16-alpine image.

dockerfile

ARG ALPINE_VERSION="3.9"
ARG NODE_VERSION="10.16-alpine"

# Node official layer
### ### ### ### ### ### ### ### ### ### ###
FROM node:${NODE_VERSION} AS node-official

WORKDIR /usr/local/bin

RUN set -eux                                                      && \
    apk --update --no-cache add \
      upx                                                         && \
    upx node                                                      ;
    # node size / before=39.8MO, after=14.2MO
    # Thanks for the idea https://github.com/mhart/alpine-node/blob/master/slim/Dockerfile :)

# Node slim layer (about 50MO lighter)
### ### ### ### ### ### ### ### ### ### ###
FROM alpine:${ALPINE_VERSION} AS node-slim

LABEL org.label-schema.ghost.node-version="${NODE_VERSION}"       \
      org.label-schema.ghost.alpine-version="${ALPINE_VERSION}"   \
      org.label-schema.ghost.maintainer="${MAINTAINER}"           \
      org.label-schema.schema-version="1.0"

RUN set -eux                                                      && \
# setup node user and group
    addgroup -g 1000 node                                         \
    && adduser -u 1000 -G node -s /bin/sh -D node                 ;

# install node without yarn, npm, npx, etc.
COPY --from=node-official /usr/local/bin/node /usr/bin/
COPY --from=node-official /usr/lib/libgcc* /usr/lib/libstdc* /usr/lib/

in production

You can see how I use this in production to build Ghost.

conclusion

I know Dockerhub doesn't support multi-stage builds at the moment, but it's not the point. The point is to include only the library needed to run our node apps in PROD.

If slim is not the right term, I don't mind. This image does not include npm, yarn. It also compress the node binary with UPX.

Thanks for considering :)

[pascalandy]

Just found this old issue. I think I have better arguments now :)

[nschonni]

Think "slim" currently has a different meaning (ex: the other "slim" still have npm/yarn). There is an separate issue discussing variants without NPM/Yarn #404

[pascalandy]

Thanks for pointing out #404 :)

[pascalandy]

Allllright