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How to Deploy Nest.js App on Digitalocean?

8 minutes read

To deploy a Nest.js app on DigitalOcean, you can follow these general steps:

  1. Set up a DigitalOcean account and create a droplet (virtual server) with your desired specifications.
  2. SSH into your droplet and ensure that you have Node.js and npm installed.
  3. Clone your Nest.js app repository onto the droplet or upload your project files directly.
  4. Install dependencies by running npm install in the project directory.
  5. Build your Nest.js app using npm run build or whatever build command you have configured.
  6. Set up a process manager like PM2 to keep your Nest.js app running in the background.
  7. Configure a reverse proxy (e.g., Nginx) to forward incoming HTTP requests to your Nest.js app.
  8. Start your Nest.js app using PM2 and verify that it is running correctly.
  9. Create a domain or subdomain for your app and configure DNS settings to point to your DigitalOcean droplet.
  10. Secure your app by setting up SSL/TLS certificates using Let's Encrypt.
  11. Continuously monitor and maintain your Nest.js app to ensure it runs smoothly on DigitalOcean.


How to deploy a Nest.js app on DigitalOcean?

To deploy a Nest.js app on DigitalOcean, you can follow these steps:

  1. Create a Droplet: Sign in to your DigitalOcean account and create a new Droplet (virtual server). Choose the desired configuration, such as the operating system, size, and region.
  2. Access the Droplet: Once the Droplet is created, you can connect to it using SSH. Copy the IP address of the Droplet and use a terminal to SSH into the Droplet. You can use a tool like PuTTY (for Windows) or Terminal (for macOS and Linux).
  3. Install Node.js and npm: Before getting started with your Nest.js app, make sure you have Node.js and npm installed on the Droplet. You can use a package manager like apt for Ubuntu or yum for CentOS to install Node.js and npm.
  4. Clone the Nest.js app repository: Use git to clone your Nest.js app repository onto the Droplet. This will copy all the source code and dependencies to the Droplet.
  5. Install dependencies: Navigate to the root directory of your Nest.js app on the Droplet and run npm install to install all the dependencies specified in the package.json file.
  6. Build the app: If your Nest.js app requires building (e.g., compiling TypeScript), run the build command specified in your package.json file. This will generate the necessary files to run the app.
  7. Start the app: Once the app is built, you can start it by running the start command specified in your package.json file. This will start the Nest.js app and make it accessible on the configured port.
  8. Set up a reverse proxy: To access your Nest.js app over HTTP or HTTPS, you can set up a reverse proxy using a tool like Nginx. Configure Nginx to proxy requests to your Nest.js app running on a specific port.
  9. Configure a domain: If you want to access your Nest.js app using a domain name, you can configure the domain to point to the IP address of your DigitalOcean Droplet. This can be done through the Domain Name System (DNS) settings of your domain registrar.
  10. Monitor and manage the app: Once the Nest.js app is deployed on DigitalOcean, you can monitor its performance using tools like pm2, monitor logs, and make updates as needed.


These are the basic steps to deploy a Nest.js app on DigitalOcean. Adjustments might be required based on the specific requirements of your app and configuration of your DigitalOcean Droplet.


How to set up SSL for a Nest.js app on DigitalOcean?

To set up SSL for a Nest.js app on DigitalOcean, you can follow these steps:

  1. Purchase a domain name if you don't already have one.
  2. Point the domain to your DigitalOcean server's IP address using DNS settings.
  3. Install Certbot on your DigitalOcean server by following the instructions on the Certbot website: https://certbot.eff.org/instructions
  4. Run Certbot to obtain an SSL certificate for your domain. You can do this by running the following command:
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sudo certbot certonly --standalone -d example.com -d www.example.com


Replace example.com with your actual domain name.

  1. Certbot will prompt you to enter an email address and agree to the terms of service. Once you have done that, Certbot will generate an SSL certificate for your domain.
  2. Update your Nest.js app's configuration to use the SSL certificate. You can do this by specifying the SSL key and certificate files in your Nest.js app's configuration file. Here is an example of how you can do this: 
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import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { readFileSync } from 'fs';
import { join } from 'path';

async function bootstrap() {
  const httpsOptions = {
    key: readFileSync(join(__dirname, '../ssl/privkey.pem')),
    cert: readFileSync(join(__dirname, '../ssl/cert.pem')),
  };

  const app = await NestFactory.create(AppModule, { httpsOptions });
  await app.listen(3000);
}
bootstrap();


Make sure to replace ../ssl/privkey.pem and ../ssl/cert.pem with the paths to your SSL key and certificate files.

  1. Restart your Nest.js app and your app should now be accessible via HTTPS using your domain name.


That's it! You have now set up SSL for your Nest.js app on DigitalOcean.


How to secure a Nest.js app on DigitalOcean from cyber threats?

Here are some steps you can take to secure a Nest.js app on DigitalOcean from cyber threats:

  1. Use HTTPS: Install an SSL certificate on your server to enable HTTPS encryption for all data exchanged between the client and server.
  2. Set up a firewall: Use DigitalOcean's built-in firewall or a third-party firewall to restrict access to your server and only allow traffic from trusted IP addresses.
  3. Secure your dependencies: Regularly update your Nest.js app dependencies to ensure that you are using the latest and most secure versions of libraries and packages.
  4. Enable rate limiting: Implement rate limiting to prevent brute force attacks and limit the number of requests that can be made to your server in a certain period of time.
  5. Use security headers: Set up security headers in your Nest.js app to mitigate common security vulnerabilities such as cross-site scripting (XSS) and clickjacking.
  6. Implement access controls: Use authentication and authorization mechanisms to control access to sensitive endpoints and data in your Nest.js app.
  7. Monitor and log security events: Set up logging and monitoring tools to track and analyze security events in real-time and respond to potential threats promptly.
  8. Regularly audit your code: Conduct regular code reviews and security audits to identify and fix vulnerabilities in your Nest.js app before they can be exploited by attackers.


By following these best practices, you can enhance the security of your Nest.js app on DigitalOcean and protect it from cyber threats.


How to install MySQL on a DigitalOcean Droplet?

To install MySQL on a DigitalOcean Droplet, you can follow these steps:

  1. SSH into your Droplet: You can access your Droplet using SSH by opening a terminal window and running the command:
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ssh root@your_droplet_ip


  1. Update package list: Before installing MySQL, it is a good idea to update the package list to ensure you are installing the latest version. Run the following command:
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sudo apt update


  1. Install MySQL server: To install MySQL server, run the following command:
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sudo apt install mysql-server


  1. Secure MySQL installation: After the installation is complete, run the following command to secure your MySQL installation:
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sudo mysql_secure_installation


Follow the prompts to set a root password, remove anonymous users, disallow remote root login, and remove test databases.

  1. Start MySQL service: After securing the installation, start the MySQL service by running the following command:
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sudo systemctl start mysql


  1. Enable MySQL to start on boot: To ensure MySQL starts automatically on boot, run the following command:
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sudo systemctl enable mysql


  1. Verify MySQL installation: You can verify that MySQL is installed and running by accessing the MySQL shell with the command:
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mysql -u root -p


Enter your root password when prompted. If you are able to access the MySQL shell, it means that MySQL has been successfully installed.


That's it! You have successfully installed MySQL on your DigitalOcean Droplet.


How to set up a database for a Nest.js app on DigitalOcean?

To set up a database for a Nest.js app on DigitalOcean, you can follow these steps:

  1. Create a Droplet on DigitalOcean:
  • Log in to your DigitalOcean account and click on the "Create" button to create a new Droplet.
  • Choose the relevant options for your Droplet, such as the datacenter region, size, and image. You can choose a pre-built image with a database like MySQL or PostgreSQL, or you can choose a basic Ubuntu image and install the database manually.
  • Once the Droplet is created, note down the IP address and login credentials.
  1. Connect to the Droplet:
  • Use an SSH client to connect to your Droplet using the IP address and login credentials provided by DigitalOcean.
  • Once connected, you can install the database server on the Droplet. For example, you can use apt-get to install MySQL or PostgreSQL.
  1. Configure the Database:
  • Set up the necessary configurations for the database server, such as creating a new database, setting up user permissions, and configuring security settings.
  • Make sure you have the necessary database drivers installed in your Nest.js app to connect to the database server.
  1. Configure Nest.js App:
  • In your Nest.js app, you can use a database ORM like TypeORM to connect to the database. Install TypeORM by running npm install typeorm in your app.
  • Configure the database connection in your Nest.js app by specifying the database type, host, port, username, password, and database name in the TypeORM configuration.
  1. Test the Database Connection:
  • Start your Nest.js app and test the database connection to make sure it is working correctly.
  • You can create database models, query data, and perform other CRUD operations on the database from your Nest.js app.


By following these steps, you can set up a database for your Nest.js app on DigitalOcean and start building your application with database functionality.

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