[ml] devkit

.docker/ocaml.dockerfile

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+FROM debian:unstable AS build
+ARG VERSION
+RUN apt update && apt install -y gcc build-essential curl unzip bubblewrap
+RUN adduser --disabled-password dev
+RUN echo | bash -c "sh <(curl -fsSL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh)" && mkdir -p /home/dev/.opam/bin && mv /usr/local/bin/opam /home/dev/.opam/bin && chown -R dev /home/dev/.opam
+USER dev
+ENV PATH="/home/dev/.opam/bin:$PATH"
+RUN opam init --compiler=${VERSION} --yes
+RUN opam install ocamlsdl2 ocaml-lsp-server odoc ocamlformat utop --yes
+
+FROM scratch
+COPY --from=build /home/dev/.opam /home/dev/.opam

.github/workflows/devkit-ocaml.yml

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+name: Devkit (ocaml)
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        lang: ["ocaml"]
+        version: ["5.1.1"]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+    - name: Publish
+      uses: elgohr/Publish-Docker-Github-Action@main
+      with:
+        name: shish2k/rosettaboy-devkit-${{ matrix.lang }}
+        dockerfile: .docker/${{ matrix.lang }}.dockerfile
+        buildoptions: "--build-arg VERSION=${{ matrix.version }}"
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        tags: ${{ matrix.version }}
+        platforms: linux/amd64,linux/arm64