Elixir/Phoenix - Dockerfiles

docker-compose.yml

version: "2"
services:
  web:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - .:/app
    environment:
      - PG_HOST=postgres
      - PG_PORT=5432
    stdin_open: true
    tty: true
    links:
      - postgres
    ports:
      - "4000:4000"
    expose:
      - "4000"

  postgres:
    image: postgres:9.6.3
    environment:
      POSTGRES_PASSWORD: postgres
      POSTGRES_USER: postgres
    ports:
      - "5432:5432"
    expose:
      - "5432"

Dockerfile

FROM elixir:1.5.2

ENV PHOENIX_VERSION=1.3.0 \
    APP_PATH=/app

RUN mkdir -p $APP_PATH
WORKDIR $APP_PATH

RUN mix local.hex
RUN yes | mix archive.install https://github.com/phoenixframework/archives/raw/master/phx_new-$PHOENIX_VERSION.ez

COPY . $APP_PATH
RUN yes | mix do deps.get, deps.compile

# https://hexdocs.pm/phoenix/installation.html#inotify-tools-for-linux-users
RUN apt-get update && apt-get install -y inotify-tools

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