aws ECR sample, コンテナファイルなど

.dockerignore

node_modules
npm-debug.log

Dockerfile

FROM node:14.15.4

WORKDIR /usr/src/app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000
CMD [ "node", "server.js" ]

package.json

{
    "name": "express_app",
    "version": "1.0.0",
    "description": "Node.js on Docker",
    "author": "First Last",
    "main": "server.js",
    "scripts": {
      "start": "node server.js"
    },
    "dependencies": {
      "express": "^4.16.1"
    }
  }

server.js

'use strict';

const express = require('express');

// Constants
const PORT = 3000;
const HOST = '0.0.0.0';

// App
const app = express();
app.get('/', (req, res) => {
  res.send('Hello World-123');
});

app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);