docker-compose.yml

version: "3"

services:
  njs1:
    build: ./njs1
    command: sh -c "npm install && npm start"
    environment:
      - NODE_ENV=development
      - PORT=7000
    ports:
      - "7000:7000"
    working_dir: /root/njs1
    volumes:
      - ./njs1:/root/njs1:cached # <--- This will map ./njs1 to /root/njs1 inside the container.

  njs2:
    image: node:12.3-alpine
    command: sh -c "npm install && npm start"
    environment:
      - NODE_ENV=development
      - PORT=8000
    ports:
      - "8000:8000"
    working_dir: /root/njs2
    volumes:
      - ./njs2:/root/njs2:cached # <--- This will map ./njs2 to /root/njs2 inside the container.

  py1:
    image: python:3-stretch
    command: sh -c "pip install -r requirements.txt && python -m server"
    environment:
      - PORT=9000
      - FLASK_ENV=development
    ports:
      - "9000:9000"
    working_dir: /root/py1
    volumes:
      - ./py1:/root/py1:cached # <--- This will map ./py1 to /root/py1 inside the container.

  go1:
    image: golang:1.12-alpine
    command: sh -c "go run ."
    environment:
      - PORT=5000
    ports:
      - "5000:5000"
    working_dir: /root/go1
    volumes:
      - ./go1:/root/go1:cached # <--- This will map ./go1 to /root/go1 inside the container.