FROM hexpm/elixir:1.15.7-erlang-26.1.2-alpine-3.18.4 AS build

RUN apk add --no-cache build-base git
WORKDIR /app
RUN mix local.hex --force && \
  mix local.rebar --force
ENV MIX_ENV=prod
COPY mix.exs mix.lock ./
RUN mix deps.get --only $MIX_ENV
RUN mkdir config

COPY config/config.exs config/${MIX_ENV}.exs config/
RUN mix deps.compile
COPY lib lib
RUN mix compile
COPY config/runtime.exs config/

COPY priv priv
RUN mix release

FROM alpine:3.18.4 AS app

RUN apk add --no-cache libstdc++ openssl ncurses-libs bash
ENV USER="elixir"
WORKDIR /app
RUN addgroup -g 1000 $USER && \
  adduser -D -u 1000 -G $USER $USER

COPY --from=build --chown=elixir:elixir /app/_build/prod/rel/backend ./

USER elixir

ENV HOME=/app
ENV MIX_ENV=prod
ENV PHX_SERVER=true

EXPOSE 4000 4369 9000-9100

CMD ["/app/bin/backend", "start"]