Dockerfile which can be used for Phoenix applications

Dockerfile

FROM elixir:1.4.2

MAINTAINER Klaus Meyer <spam@klaus-meyer.net>

ENV PORT 8080
ENV MIX_ENV prod

RUN useradd -m -d /app app
ADD . /app
RUN chown -R app:app /app

EXPOSE $PORT

RUN curl -sL https://deb.nodesource.com/setup_6.x | bash - && \
    apt-get install -y nodejs && \
    rm -rf /var/lib/apt/lists/*

USER app
WORKDIR /app

RUN mix local.hex --force && \
    mix local.rebar --force && \
    mix deps.get --only-prod && \
    mix compile && \
    mix phoenix.digest

CMD ["mix", "phoenix.server"]