.babelrc.json

{
    "presets": [
        "env"
    ]
}

.env

MYSQL_ROOT_PASSWORD=123456
MYSQL_DATABASE=database

docker-compose.yml

version: '3'

services:
  reverse-proxy:
    image: traefik # The official Traefik docker image
    command: --api --docker.exposedbydefault=false # Enables the web UI and tells Træfik to listen to docker, without exposing by default
    ports:
      - "80:80"     # The HTTP port
      - "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

  db:
    image: mysql:5
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD
      - MYSQL_DATABASE

  redis:
    image: redis:alpine

  app:
    build:
      dockerfile: Dockerfile-dev
      context: .
    command: npm run dev
    volumes:
      - "./src:/home/node/app/src"
    environment:
      - DB_HOST=db
      - DB_NAME=${MYSQL_DATABASE}
      - DB_USER=root
      - DB_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - REDIS_HOST=redis
    labels:
      - "traefik.enable=true"
      - "traefik.frontend.rule=Host:app.test.localhost.tv"
    depends_on:
      - db
      - redis

Dockerfile

###############################################################################
# Step 1 : Builder image
#
FROM node:9-alpine AS builder

# Define working directory and copy source
WORKDIR /home/node/app
COPY . .
# Install dependencies and build whatever you have to build 
# (babel, grunt, webpack, etc.)
RUN npm install && npm run build

###############################################################################
# Step 2 : Run image
#
FROM node:9-alpine
ENV NODE_ENV=production
WORKDIR /home/node/app

# Install deps for production only
COPY ./package* ./
RUN npm install && \
    npm cache clean --force
# Copy builded source from the upper builder stage
COPY --from=builder /home/node/app/build ./build

# Expose ports (for orchestrators and dynamic reverse proxies)
EXPOSE 3000

# Start the app
CMD npm start

Dockerfile-env

FROM node:9-alpine

WORKDIR /home/node/app

# Install deps
COPY ./package* ./
RUN npm install && \
    npm cache clean --force

COPY . .

# Expose ports (for orchestrators and dynamic reverse proxies)
EXPOSE 3000

# Start the app
CMD npm start

index.js

import express from 'express'

const app = express()

app.get('/', function (req, res) {
  res.send('Hello World!')
})

app.listen(3000, function () {
  console.log('Example app listening on port 3000!')
})

package.json

{
  "name": "Docker-node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "clean": "rm -rf build && mkdir build",
    "build-babel": "babel -d ./build ./src -s",
    "build": "npm run clean && npm run build-babel",
    "start": "node ./build/index.js",
    "dev": "babel-node src/index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-preset-env": "^1.7.0"
  },
  "dependencies": {
    "express": "^4.16.3"
  }
}