example nodejs docker setup

docker-compose.yml

version: '3'
services:
  node:
    restart: always
    build: .
    ports:
      - 3000:3000
    volumes:
      - ./:/code
  mongo:
    image: mongo
    ports:
      - 27017:27017
    volumes:
      - mongodb:/data/db
volumes:
 mongodb:

Dockerfile

FROM node:16-alpine
WORKDIR /app
COPY ["package.json", "package-lock.json*", "./"]
RUN npm install
COPY . .
CMD ["npm", "start"]