webkoll docker implementation (ugly)

Dockerfile

FROM elixir:latest

RUN apt-get update && \
  apt-get install -y python rsync

RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
    && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
    && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
    && apt update \
    && apt install -y nodejs yarn

ENV APP_HOME /home/app
RUN useradd -m app \
    && mkdir -p ${APP_HOME} \
    && chown -R app:app ${APP_HOME}

USER app
WORKDIR ${APP_HOME}

ENV NPM_CONFIG_PREFIX=/home/app/.npm-global
ENV PATH=$PATH:/home/app/.npm-global/bin

CMD npm i -g yarn node-sass

# Build assets
COPY ./mix.exs ./

ENV MIX_ENV prod
ENV SECRET_KEY_BASE this_is_not_a_good_secret
ENV PORT 4000

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

# Install dependencies
RUN mix deps.get --only prod

COPY --chown=app:app ./assets ./assets
COPY --chown=app:app ./config ./config

USER app
RUN mkdir -p priv/static/css priv/static/fonts priv/static/images priv/static/js \
    && cat assets/static/js/webbkoll-*.js > priv/static/js/webbkoll.js \
    && rsync -av assets/static/*  priv/static \
    && touch config/dev.secret.exs \
    && touch config/prod.secret.exs

# Build assets
# COPY --chown=app:app ./assets/package.json ./assets/yarn.lock ./assets/
RUN cd ./assets && yarn install


# Handle Elixir dependencies
COPY --chown=app:app ./mix.exs ./mix.lock ./
RUN mix do deps.get, deps.compile

# Copy rest of files over
COPY --chown=app:app . .

# Compile the project
RUN mix do compile, phx.digest

EXPOSE 4000

CMD ["/bin/bash", "-lc", "mix phx.server"]