# syntax=docker/dockerfile:1.7

# Use the official Alpine Elixir image; keep the version in sync with mix.exs
ARG ELIXIR_VERSION=1.15
FROM elixir:${ELIXIR_VERSION}-alpine AS build

ENV LANG="en_US.UTF-8" \
    MIX_ENV="prod" \
    HOME="/app"

WORKDIR /app

RUN apk update && \
    apk add --no-cache \
    build-base \
    sqlite-dev \
    openssl-dev \
    ca-certificates

RUN mix do local.hex --force, local.rebar --force

# Only copy files necessary to download deps to maximize layer caching
COPY mix.exs mix.lock ./
COPY config config

RUN mix deps.get --only ${MIX_ENV} && \
    mix deps.compile

# Copy the rest of the application source
COPY lib lib
COPY priv priv
COPY assets assets

RUN mix compile
RUN mix assets.deploy
RUN mix release

# Minimal runtime image
FROM alpine:3.19 AS app

ENV LANG="en_US.UTF-8" \
    MIX_ENV="prod" \
    PORT="4000" \
    PHX_SERVER="true" \
    DATABASE_PATH="/app/data/action_requests_demo.db"

WORKDIR /app

RUN apk add --no-cache \
    openssl \
    ncurses-libs \
    libstdc++ \
    sqlite \
    ca-certificates

# Keep SQLite data outside of the release directory so it can persist as a volume
RUN install -d -m 0755 /app/data

COPY --from=build /app/_build/prod/rel/action_requests_demo ./

RUN addgroup -S app && \
    adduser -S app -G app && \
    chown -R app:app /app

USER app

EXPOSE 4000
VOLUME ["/app/data"]

ENTRYPOINT ["./bin/action_requests_demo"]
CMD ["start"]