A docker-compose for a client/api/db+migrations app

docker-compose.yml

version: '2.1'

services:
  api:
    build:
      context: ./api/
    command: /usr/app/node_modules/.bin/nodemon index.js
    volumes:
      - ./api/:/usr/app
      - /usr/app/node_modules
    depends_on:
      db-migrator:
        condition: service_healthy
      db:
        condition: service_healthy
    environment:
      - DATABASE_URL=postgres://postgres:example@db/
      - DATABASE_SCHEMA=app_development
      - NODE_ENV=development
      - CHOKIDAR_USEPOLLING=true
    labels:
      - "traefik.frontend.rule=Host:api.docker.localhost"
      - "traefik.port=4000"
  client:
    build:
      context: ./client/
    command: npm start
    volumes:
      - ./client/:/usr/app
      - /usr/app/node_modules
    labels:
      - "traefik.frontend.rule=Host:client.docker.localhost"
      - "traefik.port=3000"
  db:
    image: mdillon/postgis:9.6
    restart: always
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
    environment:
      POSTGRES_USERNAME: postgres
      POSTGRES_PASSWORD: example
    volumes:
      - postgres-data:/var/lib/postgresql/data
    expose:
      - 5432
    labels:
      - "traefik.backend=db"
      - "traefik.frontend.rule=Host:db.docker.localhost"
      - "traefik.port=5432"
  db-migrator:
    image: boxfuse/flyway
    command: -url=jdbc:postgresql://db:5432/ -user=postgres -password=example migrate
    healthcheck:
      test: ["CMD-SHELL", "ls"]
      interval: 10s
      timeout: 5s
      retries: 5
    volumes:
      - ./api/migrations:/flyway/sql
    depends_on:
      - db
  reverse-proxy:
    image: traefik  
    command: --api --docker  # Enables the web UI and tells Træfik to listen to docker
    ports:
      - "80:80"     
      - "8080:8080"  # The Web UI (enabled by --api)
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock  # So that Traefik can listen to the Docker events
volumes:
  postgres-data: