docker-compose.nginx.yml

version: "3.8" # specify docker-compose version

# Define the services/containers to be run
services:
  angular: # name of the first service
    build: frontend # specify the directory of the Dockerfile
    container_name: mean_angular
    restart: always
    ports:
      - "4000:4000" # specify port forewarding
    environment:
      - NODE_ENV=dev

  express: #name of the second service
    build: api # specify the directory of the Dockerfile
    container_name: mean_express
    restart: always
    ports:
      - "3000:3000" #specify ports forewarding
      # Below database enviornment variable for api is helpful when you have to use database as managed service
    environment:
      - SECRET=Thisismysecret
      - MONGO_DB_USERNAME=admin-user
      - MONGO_DB_PASSWORD=admin-password
      - MONGO_DB_HOST=database
      - MONGO_DB_PORT=
      - MONGO_DB_PARAMETERS=?authSource=admin
      - MONGO_DB_DATABASE=mean-contacts
    links:
      - database

  database: # name of the third service
    image: mongo:latest # specify image to build container from
    container_name: mean_mongo
    restart: always
    environment:
      - MONGO_INITDB_ROOT_USERNAME=admin-user
      - MONGO_INITDB_ROOT_PASSWORD=admin-password
      - MONGO_DB_USERNAME=admin-user1
      - MONGO_DB_PASSWORD=admin-password1
      - MONGO_DB=mean-contacts
    volumes:
      - ./mongo:/home/mongodb
      - ./mongo/init-db.d/:/docker-entrypoint-initdb.d/
      - ./mongo/db:/data/db
    ports:
      - "27017:27017" # specify port forewarding

  nginx: #name of the fourth service
    build: loadbalancer # specify the directory of the Dockerfile
    container_name: mean_nginx
    restart: always
    ports:
      - "80:80" #specify ports forewarding
    links:
      - express
      - angular