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phoenix

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Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.

Security advisory: This version has known vulnerabilities. View advisories
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phoenix priv templates phx.gen.release Dockerfile.eex
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priv/templates/phx.gen.release/Dockerfile.eex 

# 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=<%= debian %>-<%= debian_vsn %>-slim - for the release image

#   - https://pkgs.org/ - resource for finding needed packages

#   - Ex: hexpm/elixir:<%= elixir_vsn %>-erlang-<%= otp_vsn %>-debian-<%= debian %>-<%= debian_vsn %>-slim

#

ARG ELIXIR_VERSION=<%= elixir_vsn %>

ARG OTP_VERSION=<%= otp_vsn %>

ARG DEBIAN_VERSION=<%= debian %>-<%= debian_vsn %>-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 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

<%= if assets_dir_exists? do %>

COPY assets assets



# compile assets

RUN mix assets.deploy

<% end %>

# 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 \

  && 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/<%= otp_app %> ./



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"]