ezcontainer_example/Dockerfile

# Use an official Elixir runtime as a parent image
FROM elixir:1.15.6-slim AS build

# Set the environment to production
ENV MIX_ENV=prod

# Install system dependencies
RUN apt-get update && \
    apt-get install -y build-essential sqlite3 libsqlite3-dev && \
    apt-get clean

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

# Create the application build directory
WORKDIR /app

# Copy our mix files and fetch our dependencies
COPY mix.exs mix.lock ./
COPY config config
RUN mix do deps.get, deps.compile

# Set Node.js environment to production
ENV NODE_ENV=production

# Use Node.js to install assets
FROM node:20 AS node-build
WORKDIR /app/assets
COPY assets/package.json assets/pnpm-lock.yaml ./
RUN npm install -g pnpm
RUN pnpm install
COPY assets/ ./

# Switch back to our Elixir image to continue building
FROM build AS app-build
WORKDIR /app
RUN mix phx.digest

# Copy our application source code
COPY lib lib
COPY priv priv

# Compile and build the application
RUN mix do compile, phx.digest

# Create the release
RUN mix release

# ---- Application Stage ----
FROM elixir:1.15.6-slim AS app

# Install runtime dependencies
RUN apt-get update && apt-get install -y openssl libssl-dev libsqlite3-0 && apt-get clean

# Create and switch to the app user
RUN useradd --create-home app
USER app
WORKDIR /home/app

# Copy over the build artifact from the previous step and create a symlink
COPY --from=app-build --chown=app:app /app/_build/prod/rel/ezcontainer_railway ./

# Specify the entry point
ENTRYPOINT ["/home/app/bin/ezcontainer_railway", "start"]