Move composed to a folder

compose/Dockerfile

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+FROM node:4.6
+WORKDIR /app
+ADD . /app
+RUN npm install
+EXPOSE 3000
+CMD npm start

compose/docker-compose.yml

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+web:
+  build: .
+  command: node index-db.js
+  ports:
+    - "3000:3000"
+  links:
+    - db
+  environment:
+    MYSQL_DATABASE: myapp
+    MYSQL_USER: myapp
+    MYSQL_PASSWORD: mysecurepass
+    MYSQL_HOST: db
+db:
+  image: orchardup/mysql
+  ports:
+    - "3306:3306"
+  environment:
+    MYSQL_DATABASE: myapp
+    MYSQL_USER: myapp
+    MYSQL_PASSWORD: mysecurepass

compose/index-db.js

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+var express = require('express');
+var app = express();
+var mysql = require("mysql");
+var con = mysql.createConnection({ host: process.env.MYSQL_HOST, user: process.env.MYSQL_USER, password: process.env.MYSQL_PASSWORD, database: process.env.MYSQL_DATABASE});
+
+// mysql code
+
+con.connect(function(err){
+  if(err){
+    console.log('Error connecting to db: ', err);
+    return;
+  }
+  console.log('Connection to db established');
+  con.query('CREATE TABLE IF NOT EXISTS visits (id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, ts BIGINT)',function(err) {
+    if(err) throw err;
+  });
+});
+
+// Request handling
+app.get('/', function (req, res) {
+  // create table if not exist
+  con.query('INSERT INTO visits (ts) values (?)', Date.now(),function(err, dbRes) {
+    if(err) throw err;
+    res.send('Hello World! You are visitor number '+dbRes.insertId);
+  });
+});
+
+
+// server
+var server = app.listen(3000, function () {
+  var host = server.address().address;
+  var port = server.address().port;
+
+  console.log('Example app listening at http://%s:%s', host, port);
+});

compose/index.js

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+var express = require('express');
+var app = express();
+
+app.get('/', function (req, res) {
+  res.send('Hello World!');
+});
+
+var server = app.listen(3000, function () {
+  var host = server.address().address;
+  var port = server.address().port;
+
+  console.log('Example app listening at http://%s:%s', host, port);
+});

compose/misc/Jenkinsfile

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+node {
+   def commit_id
+   stage('Preparation') {
+     checkout scm
+     sh "git rev-parse --short HEAD > .git/commit-id"                        
+     commit_id = readFile('.git/commit-id').trim()
+   }
+   stage('test') {
+     nodejs(nodeJSInstallationName: 'nodejs') {
+       sh 'npm install --only=dev'
+       sh 'npm test'
+     }
+   }
+   stage('docker build/push') {
+     docker.withRegistry('https://index.docker.io/v1/', 'dockerhub') {
+       def app = docker.build("wardviaene/docker-nodejs-demo:${commit_id}", '.').push()
+     }
+   }
+}

compose/misc/Jenkinsfile.v2

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+node {
+   def commit_id
+   stage('Preparation') {
+     checkout scm
+     sh "git rev-parse --short HEAD > .git/commit-id"
+     commit_id = readFile('.git/commit-id').trim()
+   }
+   stage('test') {
+     def myTestContainer = docker.image('node:4.6')
+     myTestContainer.pull()
+     myTestContainer.inside {
+       sh 'npm install --only=dev'
+       sh 'npm test'
+     }
+   }
+   stage('test with a DB') {
+     def mysql = docker.image('mysql').run("-e MYSQL_ALLOW_EMPTY_PASSWORD=yes") 
+     def myTestContainer = docker.image('node:4.6')
+     myTestContainer.pull()
+     myTestContainer.inside("--link ${mysql.id}:mysql") { // using linking, mysql will be available at host: mysql, port: 3306
+          sh 'npm install --only=dev' 
+          sh 'npm test'                     
+     }                                   
+     mysql.stop()
+   }                                     
+   stage('docker build/push') {            
+     docker.withRegistry('https://index.docker.io/v1/', 'dockerhub') {
+       def app = docker.build("wardviaene/docker-nodejs-demo:${commit_id}", '.').push()
+     }                                     
+   }                                       
+}                                          

compose/misc/Vagrantfile

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+Vagrant.configure(2) do |config|
+  config.vm.define "docker" do |docker|
+    docker.vm.box = "ubuntu/trusty64"
+    docker.vm.network "private_network", ip: "192.168.0.249"
+    docker.vm.hostname = "docker.example.com"
+  end
+end

compose/package.json

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+{
+  "name": "myapp",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "start": "node index.js",
+    "test": "mocha"
+  },
+  "engines": {
+    "node": "^4.6.1"
+  },
+  "dependencies": {
+    "express": "^4.14.0",
+    "mysql": "^2.10.2"
+  },
+  "devDependencies": {
+    "mocha": "^3.4.2"
+  }
+}

compose/test/test.js

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+var assert = require('assert');
+describe('Array', function() {
+  describe('#indexOf()', function() {
+    it('should return -1 when the value is not present', function() {
+      assert.equal(-1, [1,2,3].indexOf(4));
+    });
+  });
+});