Dockerfile

# ./Dockerfile
# base image Elixir to start with
FROM elixir:1.9

# install hex package manager
RUN mix local.hex --force
RUN mix local.rebar --force

# install the latest Phoenix
RUN mix archive.install https://github.com/phoenixframework/archives/raw/master/phoenix_new.ez --force

# install NodeJS, NPM and inotify (to listen to css/js files changes)
RUN curl -sL https://deb.nodesource.com/setup_10.x -o nodesource_setup.sh
RUN bash nodesource_setup.sh
RUN apt-get install nodejs
RUN apt-get install -y inotify-tools

# create our app folder and copy our code in it
RUN mkdir /app
COPY . /app
WORKDIR /app

# install dependencies
RUN mix deps.clean --all --unlock
RUN mix deps.get
RUN mix deps.compile

# We run multiples as on to install the node modules and brunch them.
# We can't separate them as each command create a temporary container which use the defined settings (WORKDIR, etc.)
RUN cd apps/admin/assets && npm install && npm run build && cd ../ && mix phx.digest

# run phoenix server
CMD mix phx.server