docker-compose.yml

# https://docs.docker.com/compose/compose-file/05-services/
services:
  # https://github.com/docker-library/docs/tree/master/postgres
  # https://github.com/docker-library/postgres/blob/master/16/bullseye/Dockerfile
  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      # here init app db, maybe run below in psql: 
      # create database hello_phx_prod
      POSTGRES_DB: hello_phx_prod
    ports:
      - 25432:5432
    # https://docs.docker.com/compose/compose-file/05-services/#healthcheck
    healthcheck:
      test: pg_isready -U postgres
      interval: 1m30s
      timeout: 10s
      retries: 3
      start_period: 30s
      start_interval: 3s
    # set shared memory limit when using docker-compose
    shm_size: 256mb
    # or set shared memory limit when deploy via swarm stack
    #volumes:
    #  - type: tmpfs
    #    target: /dev/shm
    #    tmpfs:
    #      size: 134217728 # 128*2^20 bytes = 128Mb
  
  # # init create db or init seed data here???
  # psql:
  #   image: postgres
  #   depends_on:
  #     db: 
  #       condition: service_healthy
  #   command: >
  #     sh -c "
  #       echo test connection by psql
  #       psql postgresql://postgres:postgres@db:5432/postgres -c 'select current_database()'
  #       psql postgresql://postgres:postgres@db/hello_phx_prod -c '\\conninfo'
  #       sleep 500000
  #     "

  # https://github.com/cao7113/hello-phx/pkgs/container/hello-phx
  # http://hello-phx-web-1.orb.local/
  web:
    image: ghcr.io/cao7113/hello-phx
    # image: hello-phx-web
    # build: .
    depends_on:
      db:
        condition: service_healthy
    command: >
      sh -c "
        echo Runing db migration
        bin/migrate
        echo Running web server
        bin/server
      "
    # ports:
    #   - 4000
    environment:
      #DATABASE_URL: "postgres://postgres:postgres@db:5432/hello_phx_prod"
      DATABASE_URL: "ecto://postgres:postgres@db:5432/hello_phx_prod"
      SECRET_KEY_BASE: "nVRbwGkshVYZzRYao7G98WZJBSRVqYsyVXZE0NjuSt57hBxwYTI9yPPh0fEaS1z/"
      # MIX_ENV: "prod"
      # PHX_SERVER: true
      PHX_HOST: "localhost"
      # PORT: "4000"
      # NOTE: not support ECTO_IPV6 in locally docker env???
      # ECTO_IPV6: false
    # https://docs.docker.com/compose/compose-file/05-services/#healthcheck
    healthcheck:
      test: bin/hello_phx pid || exit 1
      interval: 1m30s
      timeout: 10s
      retries: 3
      start_period: 30s
      start_interval: 3s

  curl:
    image: curlimages/curl:8.8.0
    depends_on:
      web:
        condition: service_healthy
    command: >
      sh -c "
        set -e
        # echo ping web
        # ping -c 3 web
        echo Ping web api
        curl -sS  http://web:4000/api/ping
        echo
        echo Get web build info
        curl -sS  http://web:4000/api
        echo
        echo Get db urls
        curl -sS http://web:4000/api/urls
      "