# 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-20231009-slim - for the release image | |
# - https://pkgs.org/ - resource for finding needed packages | |
# - Ex: hexpm/elixir:1.16.0-erlang-26.2.1-debian-bullseye-20231009-slim | |
# | |
ARG ELIXIR_VERSION=1.16.0 | |
ARG OTP_VERSION=26.2.1 | |
ARG DEBIAN_VERSION=bullseye-20231009-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 curl \ | |
&& apt-get clean && rm -f /var/lib/apt/lists/*_* | |
# 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 | |
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 release | |
# start a new build stage so that the final image will only contain | |
# the compiled release and other runtime necessities | |
FROM ${RUNNER_IMAGE} | |
RUN apt-get update -y && \ | |
apt-get install -y libstdc++6 openssl libncurses5 locales ca-certificates curl unzip ffmpeg \ | |
&& apt-get clean && rm -f /var/lib/apt/lists/*_* | |
# Set the locale | |
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen | |
ENV LANG en_US.UTF-8 | |
ENV LANGUAGE en_US:en | |
ENV LC_ALL en_US.UTF-8 | |
WORKDIR "/app" | |
RUN chown nobody /app | |
# set runner ENV | |
ENV MIX_ENV="prod" | |
# Only copy the final release from the build stage | |
COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/medical_transcription ./ | |
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"] | |