FROM elixir:1.15-alpine AS build

# prepare build dir
WORKDIR /app

# install hex/rebar package managers
RUN mix local.hex --force && \
    mix local.rebar --force

# Pulls in build packages required to build NIFs for bcrypt_elixir
RUN apk add build-base

# GIT is required for some github project dependencies
RUN apk add git
ARG GITHUB_USERNAME
ARG GITHUB_TOKEN
RUN git config --global url."https://$GITHUB_USERNAME:$GITHUB_TOKEN@github.com/".insteadOf "https://github.com/"

ENV MIX_ENV=prod

# Copy mix files that contain dependency lists. We do this separately to be able to cache deps between builds.
COPY mix.exs .
COPY mix.lock .
COPY apps/my_app/mix.exs apps/my_app/mix.exs
COPY apps/my_app_web/mix.exs apps/my_app_web/mix.exs

# install and compile mix dependencies
RUN mix deps.get --only prod
RUN mix deps.compile

# Digest assets
COPY apps/my_app_web/priv apps/my_app_web/assets apps/my_app_web/
RUN mix esbuild --no-runtime-config default --minify
RUN mix phx.digest

# Copy and compile apps
WORKDIR /app
COPY apps/my_app/lib apps/my_app/priv apps/my_app/test apps/my_app/
COPY apps/my_app_web/lib apps/my_app_web/test apps/my_app_web/mix.exs apps/my_app_web/
RUN mix compile

# Build release
RUN mix release

# Build minimal runtime container wihtout build tools etc
FROM alpine:3.18 AS app

# Required for Erlang
RUN apk add --no-cache openssl ncurses-libs libgcc libstdc++

WORKDIR /app

COPY --from=build /app/_build/prod/rel/my_app_umbrella ./
COPY --from=build /app/bin ./bin
ENV HOME=/app

EXPOSE 4000

CMD bin/my_app_umbrella start