docker-compose.yml

version: '3.7'

services:
  # When NGINX proxies a request, it sends the request to a specified proxied
  # server (or container), fetches the response, and sends it back to the client.
  nginx:
    container_name: nginx
    build:
      context: ./nginx
      dockerfile: Dockerfile
      target: production
    volumes:
      # Mounts the 'scripts' folder inside the host on '/opt'.
      - './scripts:/opt'
      # Mounts the 'letsencrypt' folder inside the host, required for SSL certificates.
      - '/etc/letsencrypt:/etc/letsencrypt'
    ports:
      # Expose the HTTP port to the host
      - 80:80
      # Expose the HTTPS port to the host
      - 443:443
    networks:
      - services
    depends_on:
      # First start the gateway-service container before the NGINX container.
      - gateway-service

  # Portainer allows you to manage your Docker resources: containers, images,
  # volumes, networks and more from a web interface.
  portainer:
    image: portainer/portainer:1.23.0
    command: -H unix:///var/run/docker.sock
    container_name: portainer
    volumes:
      - '/var/run/docker.sock:/var/run/docker.sock'
      - './portainer/data:/data'
    restart: always
    networks:
      - services

  gateway-database:
    image: mysql:5.7.28
    volumes:
      # Store the MySQL server data outside the container (thus on the host).
      - './gateway/database/data:/var/lib/mysql'
      # Will load the init.sql file on a fresh MySQL server instance.
      - './gateway/database/init.sql:/docker-entrypoint-initdb.d/init.sql'
    restart: always
    networks:
      # Make this service discoverable on the 'services' network.
      - gateway-service
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: gluten
      MYSQL_USER: gluten
      MYSQL_PASSWORD: gluten
  
  gateway-cache:
    image: redis:5.0.7
    volumes:
      # Store the Redis store data outside the container (thus on the host).
      - './gateway/cache:/data'
    restart: always
    networks:
      - gateway-service

  gateway-service:
    build: ./gateway/service
    volumes:
      # Mounts the 'scripts' folder inside the host on '/opt'.
      - './scripts:/opt'
      # Store the logs outside the container (thus on the host).
      - './gateway/service/logs:/usr/src/app/logs'
    networks:
      # Make this service discoverable on the 'services' network.
      - services
      # Get access to the database and cache.
      - gateway-service
    links:
      # This allows the access to the gateway-cache using hostname 'cache'.
      - gateway-cache:cache
      # This allows the access to the gateway-cache using hostname 'database'.
      - gateway-database:database
    depends_on:
      - gateway-cache
      - gateway-database
    environment:
      MYSQL_HOST: database
      NODE_ENV: production
      REDIS_HOST: cache

networks:
  # Network that links all services with NGINX.
  services: {}
  # Dedicated network to seperate the dependencies of the gateway-service.
  gateway-service: {}