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# 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-20210902-slim - for the release image
# - https://pkgs.org/ - resource for finding needed packages
# - Ex: hexpm/elixir:1.13.4-erlang-24.0.1-debian-bullseye-20210902-slim
#
ARG ELIXIR_VERSION=1.14.2
ARG OTP_VERSION=25.1
ARG DEBIAN_VERSION=bullseye-20220801-slim
ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
ARG RUNNER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${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
# set build ENV
ENV MIX_ENV="prod"
ENV MIX_HOME="/app/.mix"
ENV EXS_DRY_RUN="true"
ENV MIX_INSTALL_DIR="/app/.mix"
ENV BUMBLEBEE_CACHE_DIR="/app/.bumblebee"
# install hex + rebar
RUN mix local.hex --force && \
mix local.rebar --force
# install mix dependencies
COPY run.exs ./
RUN elixir ./run.exs
# start a new build stage so that the final image will only contain
# the compiled release and other runtime necessities
FROM ${RUNNER_IMAGE}
# 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/*_*
WORKDIR "/app"
# set runner ENV
ENV MIX_ENV="prod"
ENV MIX_HOME="/app/.mix"
ENV MIX_INSTALL_DIR="/app/.mix"
ENV BUMBLEBEE_CACHE_DIR="/app/.bumblebee"
ENV SHELL=/bin/bash
ENV PORT=7860
EXPOSE 7860
# Only copy the final release from the build stage
COPY --from=builder --chown=nobody:root /app/.mix/ ./.mix
COPY --from=builder --chown=nobody:root /app/.bumblebee/ ./.bumblebee
COPY --from=builder --chown=nobody:root /app/run.exs ./
CMD ["elixir", "/app/run.exs"]
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