docker compose dockerfile nodejs code example

Example 1: docker-compose node

version: '2'
services:
  web:
    build: .
    command: npm run dev
    volumes:
      - .:/usr/app/
      - /usr/app/node_modules
    ports:
      - "3000:3000"
    depends_on:
      - postgres
    environment:
      DATABASE_URL: postgres://todoapp@postgres/todos
  postgres:
    image: postgres:9.6.2-alpine
    environment:
      POSTGRES_USER: todoapp
      POSTGRES_DB: todos

Example 2: node js docker compose

version: '3'

services:
  backend:
    env_file:
        "./backend/backend.env"
    build:
      context: ./backend
      dockerfile: ./Dockerfile
    image: "dmurphy1217/twitter-sentiment-backend"
    ports:
      - "5000:5000"
  frontend:
    build:
      context: ./client
      dockerfile: ./Dockerfile
    image: "dmurphy1217/twitter-sentiment-frontend"
    ports:
      - "3000:3000"
    links:
      - "backend:be"