DockerizeNodeJS

Step by step tutorial, How to dockerize a nodejs istance

chinaski@chinaski-XPS-15-9550:~$ cd Desktop/
chinaski@chinaski-XPS-15-9550:~/Desktop$ mkdir DockerizeNodeJS
chinaski@chinaski-XPS-15-9550:~/Desktop$ cd DockerizeNodeJS/
chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ sudo npm init
name: (DockerizeNodeJS) dockerizenodejs
version: (1.0.0) 
description: Step by step tutorial - How to dockerize NodeJS applications
entry point: (index.js) 
test command: 
git repository: 
keywords: docker,nodejs,dockerize
author: AndreaBorio
license: (ISC) GPL
Sorry, license should be a valid SPDX license expression (without "LicenseRef"), "UNLICENSED", or "SEE LICENSE IN <filename>" and license is similar to the valid expression "GPL-3.0".
license: (ISC) 
About to write to /home/chinaski/Desktop/DockerizeNodeJS/package.json:

{
  "name": "dockerizenodejs",
  "version": "1.0.0",
  "description": "Step by step tutorial - How to dockerize NodeJS applications",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "docker",
    "nodejs",
    "dockerize"
  ],
  "author": "AndreaBorio",
  "license": "ISC"
}

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ npm install express --save

Package.json

{
  "name": "dockerizenodejs",
  "version": "1.0.0",
  "description": "Step by step tutorial - How to dockerize NodeJS applications",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "docker",
    "nodejs",
    "dockerize"
  ],
  "author": "AndreaBorio",
  "license": "ISC",
  "dependencies": {
    "express": "^4.16.3"
  }
}

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ touch index.js

index.js

var express = require('express')
var app = express()

app.get('/', function (req, res) {
  res.send('Hey folks!')
})

app.listen(8000, function () {
  console.log('server listening on port 8000!')
})

Run your server

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ node index.js
server listening on port 8000!

.Dockerfile

FROM node:7
WORKDIR /app
COPY package.json /app
RUN npm install
COPY . /app
CMD node index.js
EXPOSE 8000

Building image

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ sudo docker build -t dockerizenodejs .

Push the image to Docker Hub

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ docker push andreaborio/dockerizenodejs
The push refers to repository [docker.io/andreaborio/dockerizenodejs]

Now test image

chinaski@chinaski-XPS-15-9550:~/Desktop/DockerizeNodeJS$ docker run andreaborio/dockerizenodejs
server listening on port 8000!

It works!