Dockerfile.prod

# Use the official Elixir image as the base image
FROM elixir:1.16-alpine as build

# Install build dependencies
RUN apk update && \
    apk upgrade --no-cache && \
    apk add --no-cache \
      build-base \
      gcc \
      git \
      make \
      libc-dev \
      bash \
      inotify-tools \
      postgresql-client \
      erlang-dev

# Set the working directory inside the container
WORKDIR /app

# Install Hex and Rebar
RUN mix local.hex --force && \
    mix local.rebar --force

# Set environment to prod for building
ENV MIX_ENV=prod

# Copy over the necessary application files and directories
COPY config/ config/
COPY lib/ lib/
COPY priv/ priv/
COPY assets/ assets/
COPY mix.exs .
COPY mix.lock .

# Fetch the application dependencies and compile the app
RUN mix deps.get --only prod && \
    mix deps.compile

# Compile assets and digest them (assuming esbuild or another tool is configured in your mix.exs)
RUN mix assets.deploy && \
    mix phx.digest

# Build the release
RUN mix release

# Start a new build stage to create a cleaner final image
FROM alpine:latest

# Install runtime dependencies
RUN apk update && \
    apk upgrade --no-cache && \
    apk add --no-cache \
      bash \
      openssl \
      ncurses-libs \
      postgresql-client \
      libstdc++

# Set the working directory inside the container
WORKDIR /app

# Copy the release from the build stage
COPY --from=build /app/_build/prod/rel/website_45s_v3 ./

# Copy the entrypoint script to the container
COPY prod_entrypoint.sh /app/entrypoint.sh

# Make the script executable
RUN chmod +x /app/entrypoint.sh

# Expose port 4000 for the app
EXPOSE 4000

# Use the entrypoint script to run migrations and then start the Phoenix server
ENTRYPOINT ["/app/entrypoint.sh"]