Made an attempt to make docker images lighter.

[Carbrex]

I have made changes to some docker files to reduce their size.
You dont need to merge this. I was just trying to reduce the size you can incorporate the changes you want.

These are the comparisons before and after changes:

Before changes:

docker images

docker stats

After changes:

docker images

docker stats

To make an sbt image for alpine I took this https://github.com/buildo/scala-sbt-alpine/blob/master/Dockerfile and made some changes to this. It works just fine and lila and lila-fishnet work fine too.
I think the ui.Dockerfile can be taken as it is. It works well with chessground and pgn-viewer also.

[fitztrev]

Looking great, thanks! Yeah if you want to split out the updates to the node-based images, those could be merged.

[Carbrex]

I think the only node based image is the ui one. You can just copy paste the changes from this pr I dont think we need a pr for that.

[Carbrex]

Reduced the size of picfit image in this commit but the image build process downloads 1GB data. So, I uploaded this image on docker and now the build time is reduced pretty much. Either we can use it carbrex/thoas-picfit:latest as it is or upload on docker hub under lichess and then use it?

# Build stage
FROM golang:1.22.1-alpine3.19 AS build

RUN apk --no-cache add git make

WORKDIR /opt

RUN git clone --depth 1 https://github.com/thoas/picfit.git
RUN make -C /opt/picfit build

# Runtime stage
FROM alpine:3.19

COPY --from=build /opt/picfit/bin/picfit /picfit

ENTRYPOINT ["/picfit"]

[Carbrex]

Before:

After:

Changes:
lila-docker-picfit: 1.39GB -> 50.3MB
lila-docker-lila_fishnet: 977MB->792MB
lila-docker-lila: 977MB->792MB
lila-docker-lila_ws: 977MB->792MB
lila-docker-lila_search: 945MB->760MB
lila-docker-ui: 1.12GB->347MB

[fitztrev]

@Carbrex it looks like thoas/picfit has started updating their docker hub image again with the latest release. Could we use that as the base image?

[Carbrex]

@Carbrex it looks like thoas/picfit has started updating their docker hub image again with the latest release. Could we use that as the base image?

Yes, I saw that but it only supports arm for now. I have filed an issue on github, we can wait for it to get resolved. thoas/picfit#192

[fitztrev]

I'm OK to merge now if it's ready?

We can use your hosted image for now. At some point maybe we can move it to be hosted by ghcr, like I'm doing with #62

[Carbrex]

Its ready.

[fitztrev]

Nice improvement, thanks!