Dockerfile

# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian
# instead of Alpine to avoid DNS resolution issues in production.
#
# https://hub.docker.com/r/hexpm/elixir/tags?page=1&name=ubuntu
# https://hub.docker.com/_/ubuntu?tab=tags
#
# This file is based on these images:
#
#   - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
#   - https://hub.docker.com/_/debian?tab=tags&page=1&name=bullseye-20220801-slim - for the release image
#   - https://pkgs.org/ - resource for finding needed packages
#   - Ex: hexpm/elixir:1.14.2-erlang-25.1.1-debian-bullseye-20220801-slim
#
ARG ELIXIR_VERSION=1.14.2
ARG OTP_VERSION=25.1.1
ARG DEBIAN_VERSION=bullseye-20220801-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 build-essential git \
    && apt-get install git && apt-get clean && rm -f /var/lib/apt/lists/*_*

# prepare build dir
# WORKDIR /app
COPY . /code
RUN git clone https://github.com/joeybellerose/elixir4ds.git

WORKDIR "/elixir4ds"
RUN echo "$PWD"

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

# set build ENV
ENV MIX_ENV="prod"
ENV PHX_SERVER=true

# 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

# COPY lib lib

# COPY assets assets

# 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 phx.gen.release
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}

# RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales \
#   && apt-get clean && rm -f /var/lib/apt/lists/*_*

# # 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/elixir4ds ./

# USER nobody

CMD ["/elixir4ds/_build/prod/rel/elixir4ds/bin/elixir4ds", "start"]