- Ubuntu 18.04 system with server setup
- Docker installed on your server
- Node.js and npm installed
- A Docker Hub account. For storing files and fetch , pull , push like github
- Create a directory for the project
mkdir node_project - Navigate to the directory
cd node_project - create a package.json file with project’s dependencies
nano package.json - add dependencies into package.json file
{
"name": "nodejs-image-demo",
"version": "1.0.0",
"description": "nodejs image demo",
"author": "Sammy the Shark <[email protected]>",
"license": "MIT",
"main": "app.js",
"keywords": [
"nodejs",
"bootstrap",
"express"
],
"dependencies": {
"express": "^4.16.4"
}
}
- install project’s dependencies
npm install
- create app.js file
nano app.js - add the Express application and Router objects and define the base directory and port as constants:
const express = require('express');
const app = express();
const router = express.Router();
const path = __dirname + '/views/';
const port = 8080;
router.use(function (req,res,next) {
console.log('/' + req.method);
next();
});
router.get('/', function(req,res){
res.sendFile(path + 'index.html');
});
router.get('/sharks', function(req,res){
res.sendFile(path + 'sharks.html');
});
app.use(express.static(path));
app.use('/', router);
app.listen(port, function () {
console.log('Example app listening on port 8080!')
})
- create views folder
mkdir views - create
index.htmlfilenano views/index.html - Fill the content with below code
<!DOCTYPE html>
<html lang="en">
<head>
<title>About Sharks</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<link href="css/styles.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Merriweather:400,700" rel="stylesheet" type="text/css">
</head>
<body>
<nav class="navbar navbar-dark bg-dark navbar-static-top navbar-expand-md">
<div class="container">
<button type="button" class="navbar-toggler collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
</button> <a class="navbar-brand" href="#">Everything Sharks</a>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav mr-auto">
<li class="active nav-item"><a href="/" class="nav-link">Home</a>
</li>
<li class="nav-item"><a href="/sharks" class="nav-link">Sharks</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="jumbotron">
<div class="container">
<h1>Want to Learn About Sharks?</h1>
<p>Are you ready to learn about sharks?</p>
<br>
<p><a class="btn btn-primary btn-lg" href="/sharks" role="button">Get Shark Info</a>
</p>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-lg-6">
<h3>Not all sharks are alike</h3>
<p>Though some are dangerous, sharks generally do not attack humans. Out of the 500 species known to researchers, only 30 have been known to attack humans.
</p>
</div>
<div class="col-lg-6">
<h3>Sharks are ancient</h3>
<p>There is evidence to suggest that sharks lived up to 400 million years ago.
</p>
</div>
</div>
</div>
</body>
</html>
- create a another HTML file for navigation
nano views/sharks.html - add the below code to sharks.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>About Sharks</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<link href="css/styles.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Merriweather:400,700" rel="stylesheet" type="text/css">
</head>
<nav class="navbar navbar-dark bg-dark navbar-static-top navbar-expand-md">
<div class="container">
<button type="button" class="navbar-toggler collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
</button> <a class="navbar-brand" href="/">Everything Sharks</a>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav mr-auto">
<li class="nav-item"><a href="/" class="nav-link">Home</a>
</li>
<li class="active nav-item"><a href="/sharks" class="nav-link">Sharks</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="jumbotron text-center">
<h1>Shark Info</h1>
</div>
<div class="container">
<div class="row">
<div class="col-lg-6">
<p>
<div class="caption">Some sharks are known to be dangerous to humans, though many more are not. The sawshark, for example, is not considered a threat to humans.
</div>
<img src="https://assets.digitalocean.com/articles/docker_node_image/sawshark.jpg" alt="Sawshark">
</p>
</div>
<div class="col-lg-6">
<p>
<div class="caption">Other sharks are known to be friendly and welcoming!</div>
<img src="https://assets.digitalocean.com/articles/docker_node_image/sammy.png" alt="Sammy the Shark">
</p>
</div>
</div>
</div>
</html>
- now add css files
mkdir views/css - create styles css file
nano views/css/styles.cssand add the below content
.navbar {
margin-bottom: 0;
}
body {
background: #020A1B;
color: #ffffff;
font-family: 'Merriweather', sans-serif;
}
h1,
h2 {
font-weight: bold;
}
p {
font-size: 16px;
color: #ffffff;
}
.jumbotron {
background: #0048CD;
color: white;
text-align: center;
}
.jumbotron p {
color: white;
font-size: 26px;
}
.btn-primary {
color: #fff;
text-color: #000000;
border-color: white;
margin-bottom: 5px;
}
img,
video,
audio {
margin-top: 20px;
max-width: 80%;
}
div.caption: {
float: left;
clear: both;
}
- Navigate to project’s root directory
cd /node_project - start the application
node app.js - Application is running on port
http://127.0.0.1:8080/ - terminal output
Example app listening on port 8080!
- create the Dockerfile in root directory
nano Dockerfile - set the base image , here we are using alphine because it is smaller
FROM node:10-alpine - instead of running in root directory we make non root node user to run the project without any dependencies and giving all permissions to the directory
RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app - create a working directory
WORKDIR /home/node/app - copy package.json dependancies to the current working directory
COPY package*.json ./ - create a node user
USER node - main part code to run out node project
RUN npm install - copy application code with the appropriate permissions to the application directory on the container
COPY --chown=node:node . . - set the port on the container to start the project
CMD [ "node", "app.js" ]
overall code :
FROM node:10-alpine
RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app
WORKDIR /home/node/app
COPY package*.json ./
USER node
RUN npm install
COPY --chown=node:node . .
EXPOSE 8080
CMD [ "node", "app.js" ]
-
docker build -t your_dockerhub_username/nodejs-image-demo . -
-
docker images
newly created Docker image
- Our newly created docker image will be on Docker desktop in
unused state
- Now we can run the docker image with
docker run --name nodejs-image-demo -p 80:8080 -d your_dockerhub_username/nodejs-image-demoor run it manually in docker desktop environment
- view the docker process
- view the webpage in
http://127.0.0.1`` port not inhttp://127.0.0.1:8080```
- Now our Docker image is running which is shown in Docker Desktop
-
login into docker hub
docker login -u your_dockerhub_username -
push the image to your repo
docker push your_dockerhub_username/nodejs-image-demo -
list your running containers:
docker ps -
List your all of your images with the -a flag:
docker images -a -
-
now deleted all the files locally using
docker system prune -a
- pull from our repo
docker pull your_dockerhub_username/nodejs-image-demo
-
List your images once again:
docker images -
-
run it
docker run --name nodejs-image-demo -p 80:8080 -d your_dockerhub_username/nodejs-image-demo -
you'll see the same output
