Dockerfile

ARG ELIXIR_VERSION=1.16.2
ARG OTP_VERSION=26.2.4
ARG DEBIAN_VERSION=bullseye-20240423-slim

ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"

FROM ${BUILDER_IMAGE} as builder

# install build dependencies
RUN apt-get update -y && apt-get install -y curl build-essential git \
    && apt-get clean && rm -f /var/lib/apt/lists/*_*


# install node
# https://github.com/nodesource/distributions#installation-instructions
RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash - \
    && apt-get install -y nodejs

# install latest npm
RUN npm install -g npm

# prepare build dir
WORKDIR /app

# install hex + rebar
RUN mix local.hex --force && \
    mix local.rebar --force

# set build ENV
ENV MIX_ENV="prod"

# install mix dependencies
COPY mix.exs mix.lock ./
RUN mix deps.get --only $MIX_ENV
RUN mkdir config

# copy compile-time config files before we compile dependencies
# to ensure any relevant config change will trigger the dependencies
# to be re-compiled.
COPY config/config.exs config/${MIX_ENV}.exs config/
RUN mix deps.compile

COPY priv priv


# install npm dependencies
RUN npm --prefix ./priv/og_image_js ci --progress=false --no-audit --loglevel=error --cache .npm


COPY lib lib

COPY assets assets

# install all npm packages in assets directory
WORKDIR /app/assets
RUN npm install

WORKDIR /app

# compile assets
RUN mix assets.deploy

# Compile the release
RUN mix compile

# Changes to config/runtime.exs don't require recompiling the code
COPY config/runtime.exs config/

COPY rel rel
RUN mix release

# start a new build stage so that the final image will only contain
# the compiled release and other runtime necessities
FROM ${RUNNER_IMAGE}

# https://dev.to/cloudx/how-to-use-puppeteer-inside-a-docker-container-568c
RUN apt-get update -y \
  && apt-get install -y libstdc++6 openssl libncurses5 locales ca-certificates curl gnupg procps \
  && curl --location --silent https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
  && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
  && apt-get update \
  && apt-get install google-chrome-stable -y --no-install-recommends \
  && apt-get clean && rm -f /var/lib/apt/lists/*_*

# install node
# https://github.com/nodesource/distributions#installation-instructions
RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
RUN apt-get install -y nodejs

# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen

ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8

WORKDIR "/app"
RUN chown nobody /app

# set runner ENV
ENV MIX_ENV="prod"

# Only copy the final release from the build stage
COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/plive ./

USER nobody

# If using an environment that doesn't automatically reap zombie processes, it is
# advised to add an init process such as tini via `apt-get install`
# above and adding an entrypoint. See https://github.com/krallin/tini for details
# ENTRYPOINT ["/tini", "--"]

CMD ["/app/bin/server"]