docker-compose.alpine.yml

# compose name
name: docker-compose-learning-alpine

# tell compose to create this all services
services:
  # backend app service section
  backend:
    container_name: golang_container
    # set container system environment
    environment:
      - DB_USER=${DB_USER}
      - DB_PASS=${DB_PASS}
      - DB_NAME=${DB_NAME}
      - DB_HOST=${DB_HOST}
      - DB_PORT=${DB_PORT}
    # build with given Dockerfile 
    build:
      context: ./go-sample-postgres/
      dockerfile: Dockerfile.alpine
    # environment file
    env_file:
      - .env
    # port to expose <HOST_PORT>:<CONTAINER_PORT>
    ports:
      - 8080:8080
    # restart policy, The policy always restarts the container until its removal
    # https://github.com/compose-spec/compose-spec/blob/master/spec.md#restart
    restart: always
    # container will waiting postgresdb until condition service is healthy (indicate via healthcheck)
    depends_on:
      postgresdb:
        condition: service_healthy
    # container network
    networks:
      - learning

  # frontend web service section
  frontend:
    container_name: vue_container
    # build with given Dockerfile
    build:
      context: ./vue_sample/
      dockerfile: Dockerfile.alpine
    # environment file
    env_file:
      - .env
    # port to expose <HOST_PORT>:<CONTAINER_PORT>
    ports:
      - 80:80
    # restart policy, The policy always restarts the container until its removal
    # https://github.com/compose-spec/compose-spec/blob/master/spec.md#restart
    restart: always
    # container network
    networks:
      - learning

  # database service name postgresdb
  postgresdb:
    # image to pull and use
    image: postgres:latest
    container_name: postgres_container
    environment:
      - POSTGRES_USER=${DB_USER}
      - POSTGRES_PASSWORD=${DB_PASS}
      - POSTGRES_DB=${DB_NAME}
      - DATABASE_HOST=${DB_HOST}
    env_file:
      - .env
    ports:
      - '5432:5432'
    # map persistent data stores
    volumes:
      - learning_pg_data:/var/lib/postgresql/data
    networks:
      - learning
    # indicator container is healty
    healthcheck:
      test: [ "CMD-SHELL", "pg_isready -U postgres" ]
      interval: 5s
      timeout: 5s
      retries: 5

# Volume for persistent postgres db data
volumes:
  learning_pg_data:

# Networks to be created to facilitate communication between containers
networks:
  learning:
    driver: bridge