nodejs deployment server

Node.js is a very popular server-side JavaScript tool that makes it easy to build efficient, scalable web applications. In this article, we will introduce how to use Node.js to deploy a server.

Step 1: Select the server

On the server where Node.js is deployed, you must select a hosting service that supports Node.js. Therefore, we recommend that you choose a hosting service that supports Node.js, such as Amazon Web Services, Digital Ocean, or Heroku, etc.

Step 2: Install Node.js

Installing Node.js on your server is very simple. Under Ubuntu, you can use the following command to install Node.js:

sudo apt-get update
sudo apt-get install nodejs

After the installation is complete, you can verify whether the installation is successful by entering the following command:

node -v

Step 3: Write Node.js Application

Before you start writing a Node.js application, you need to install the npm package manager. You can install npm using the following command:

sudo apt-get install npm

Now you can use NPM to install all dependencies, after which you can write your server-side code in usual JavaScript files.

For example, the following code snippet creates a simplest server that will send "Hello World!" to the user when the user accesses port 3000:

const http = require('http');

const hostname = '127.0.0.1'
const port = 3000

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World!')
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Step 4: Start Node .js application

To start a Node.js application, run the following command on the server:

node app.js

Alternatively, you can use the globally installed PM2 to automate the management process to make it even easier Startup:

pm2 start app.js

Step 5: Use NGINX as a reverse proxy

In order for your application to accommodate more traffic, you need to scale with a reverse proxy. Here we can use NGINX as a reverse proxy.

First, you need to install NGINX:

sudo apt-get install nginx

Then, you need to create a new file as sites-available, which contains the configuration of NGINX. A new file can be created using the following command:

sudo nano /etc/nginx/sites-available/your-site-name

Then you can add the configuration:

server {
  listen 80;
  server_name your-domain.com;

  location / {
    proxy_pass http://localhost:3000;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}

Finally, you need to enable this site:

sudo ln -s /etc/nginx/sites-available/your-site-name /etc/nginx/sites-enabled/

Step 6: Enable HTTPS encryption

For websites that use sensitive information, it is recommended that you enable the HTTPS protocol. To enable the HTTPS protocol, you need to purchase an SSL certificate, which can be purchased from an SSL provider.

After installing the SSL certificate, you need to modify the NGINX configuration file:

server {
  listen 443;
  server_name your-domain.com;

  ssl on;
  ssl_certificate /path/to/your_cert.pem;
  ssl_certificate_key /path/to/your_key.pem;

  location / {
    proxy_pass http://localhost:3000;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}

Finally, you need to restart NGINX for the changes to take effect:

sudo service nginx restart

Conclusion

Through this article, we have described how to use Node.js to deploy servers. You now know the basics of installing Node.js, writing server-side JavaScript, enabling a reverse proxy, and enabling HTTPS. Hope this helps you in deploying Node.js server.

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