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docker build -t <your username>/node-web-app .

docker images

docker run -p <customPort>:<nodePort> -d <your username>/node-web-app



#Print the output of your app:

# Get container ID
$ docker ps

# Print app output
$ docker logs <container id>

# Example
Running on http://localhost:8080

# Enter the container
$ docker exec -it <container id> /bin/bash

node_modules
npm-debug.log

FROM node:7

# Create app directory
WORKDIR /app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json /app

RUN npm install
# If you are building your code for production
# RUN npm install --only=production

# Bundle app source
COPY . /app

CMD [ "npm", "start" ]
EXPOSE 8080

{
  "name": "docker_web_app",
  "version": "1.0.0",
  "description": "Node.js on Docker",
  "author": "First Last <first.last@example.com>",
  "main": "server.js",
  "scripts": {
    "start": "node server.js"
  },
  "dependencies": {
    "express": "^4.16.1"
  }
}

//create app file

//example

'use strict';

const express = require('express');

// Constants
const PORT = 8080;
const HOST = '0.0.0.0';

// App
const app = express();
app.get('/', (req, res) => {
  res.send('Hello world\n');
});

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