With Dockerfile

    FROM ubuntu:oracular
    RUN apt-get update
    RUN apt install -y opam
    RUN apt install -y build-essential

    RUN opam init -y
    RUN git clone https://git.sr.ht/~jonsterling/ocaml-forester
    RUN cd ocaml-forester; opam pin -y .

    RUN apt install -y curl
    RUN curl https://sh.rustup.rs -sSf | \
        sh -s -- --default-toolchain stable -y

    ENV PATH=/root/.cargo/bin:$PATH
    ENV PATH=/root/.opam/default/bin:$PATH

    RUN cargo install forest-server

    WORKDIR /app

    CMD [ "forest", "watch", "--", "build --dev forest.toml" ]

one can build a docker image via `docker build . -t xxx:latest`.
Then create a compose configuration:

    services:
      xxx:
        image: "xxx:latest"
        working_dir: "<hostpath/to/forest>"
        ports:
          - "80:80"
        labels:
          - "traefik.enable=true"
          - "traefik.http.routers.whoami.rule=Host(`xxx.localhost`)"
          - "traefik.http.routers.whoami.entrypoints=web"
        volumes:
          - "./:<hostpath/to/forest>"
      traefik:
        image: "traefik:v2.10"
        container_name: "traefik"
        command:
          - "--api.insecure=true"
          - "--providers.docker=true"
          - "--providers.docker.exposedbydefault=false"
          - "--entrypoints.web.address=:80"
        ports:
          - "80:80"
          # Web UI
          - "8080:8080"
        volumes:
          - "/var/run/docker.sock:/var/run/docker.sock:ro"

Then run `docker compose up -d`. With these setup, the forest
can be access via `xxx.localhost`, so one get a background service
for forest, just add new notes.

Best,
Tsú-thuàn