basic docker compose example

docker-compose.yml

version: '3'
services:
  web:
    container_name: nginx_image
    image: nginx
    volumes: 
      - .:/usr/share/nginx/html
    ports:
      - '3000:80'

  
  app:
    container_name: nginx_build
    restart: always
    build: .
    ports:
      - '3002:80'
    volumes: 
      - .:/usr/share/nginx/html
    # links:
    #   - mongo
      
  # mongo:
  #   container_name: mongo
  #   image: mongo
  #   ports:
  #     - '27017:27017'