docker-compose.yml

# docker-compose.yml
version: "3"
services:
  app:
    restart: on-failure
    build: .
    depends_on:
      - postgres
    env_file: ./.env
    ports:
      - $NODE_LOCAL_PORT:$NODE_DOCKER_PORT
    command: sh -c "node ./server/built/app.js"
    environment:
      - DB_HOST=postgres
      - DB_USER=$POSTGRES_USER
      - DB_PASSWORD=$POSTGRES_PASSWORD
      - DB_NAME=$POSTGRES_DB
      - DB_PORT=$POSTGRES_DB_DOCKER_PORT
      - DATABASE_URL=postgres://$POSTGRES_USER:$POSTGRES_PASSWORD@postgres:$POSTGRES_DB_DOCKER_PORT/$POSTGRES_DB
    volumes:
      - .:/app
      - /app/server/node_modules/
  postgres:
    image: postgres:11
    env_file: ./.env
    ports:
      - $POSTGRES_DB_LOCAL_PORT:$POSTGRES_DB_DOCKER_PORT
    environment:
      POSTGRES_USER: $POSTGRES_USER
      POSTGRES_PASSWORD: $POSTGRES_PASSWORD
      POSTGRES_DB: $POSTGRES_DB

    volumes:
       - ./server/data:/var/lib/postgresql/data