###############
# Build stage #
###############
FROM elixir:1.12.2 as build

ARG MIX_ENV="prod"

RUN mix local.hex --force && \
    mix local.rebar --force

COPY config ./config
COPY lib ./lib
COPY rel ./rel
COPY priv ./priv
COPY mix.exs .
COPY mix.lock .

RUN mix deps.get --force --only prod
RUN mix release --force --path /export

####################
# Deployment Stage #
####################
FROM erlang:24.0.5

COPY --from=build /export /opt

EXPOSE 8080

ENTRYPOINT ["/opt/bin/hello"]
CMD ["start"]