Elixir Docker makefile

docker-compose.yml

version: '3'

services:
  backend:
    container_name: gcm_backend
    build:
      context: .
      dockerfile: ./docker/Dockerfile
      args:
        - USER_UID=${USER_UID}
        - UNAME=${UNAME}
    user: ${USER_UID}
    ports:
      - "4000:4000"
    command: mix phx.server
    environment:
      - MIX_ENV=dev
      - PORT=4000
      - DB_HOST=database
    volumes:
      - .:/app
    links:
      - database

  database:
    image: postgres
    container_name: gcm_database
    environment:
      - POSTGRES_DB=password
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres
      - POSTGRES_HOST=database

Dockerfile

FROM elixir:alpine
WORKDIR /app
ARG USER_UID
ARG UNAME
EXPOSE 4000

RUN apk add --no-cache curl bash
RUN curl --url https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh --output /wait-for-it.sh
COPY ./docker/entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
RUN chmod +x /wait-for-it.sh
RUN apk del curl

# Add a user and group mimicing the current user on host system (this ensures correct permissions when developing on the host machine)
RUN adduser -D -u $USER_UID $UNAME
USER $UNAME


# Update hex
RUN mix local.hex --force
# Update rebar
RUN mix local.rebar --force
# Install Phoenix
RUN mix archive.install --force hex phx_new 1.4.0

ENTRYPOINT ["/entrypoint.sh"]
CMD ["mix", "phx.start"]

entrypoint.sh

#!/usr/bin/env bash

if [[ -d "./deps" ]]; then
  echo "Skipping 'mix deps.get' because dependencies already exist."
else
    echo "Installing Mix dependencies because 'deps' folder does not exist."
    mix deps.get deps.compile
fi

exec "$@";

Makefile

.PHONY: all up shell down clean test
UID=$$(id -u)
UNAME=$$(whoami)
DOCKER_ENV=UNAME=$(UNAME) USER_UID=$(UID)

all: up

up:
	$(DOCKER_ENV) docker-compose up backend

shell:
	$(DOCKER_ENV) docker-compose run backend bash

down:
	$(DOCKER_ENV) docker-compose down

clean:
	$(DOCKER_ENV) docker-compose down --rmi all --remove-orphans
	docker container prune --force
	docker image prune --force

test:
	$(DOCKER_ENV) docker-compose run backend tests