How to deploy Express.js on web hosting?

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To deploy an Express.js application on web hosting, you need to follow these steps:

1. Choose a web hosting provider: Select a web hosting provider that supports Node.js hosting. Some popular providers include Heroku, AWS, DigitalOcean, and Google Cloud.
2. Set up a server or hosting environment: Set up a server or hosting environment using the provider you have chosen. This might involve signing up for an account, creating a server instance, and configuring the necessary settings.
3. Install Node.js: Once your hosting environment is set up, install Node.js on the server. This will enable you to run Express.js applications.
4. Upload your Express.js application: Use FTP or a similar method to upload your Express.js application to the server. Make sure to include all necessary files and dependencies like package.json and node_modules folder.
5. Install dependencies: On the server, navigate to the directory where you uploaded your application and run the command npm install to install all the dependencies specified in the package.json file.
6. Start the server: Run the command node app.js or npm start to start the Express.js server.
7. Open necessary ports: Ensure that the necessary ports (usually 80 or 443) are open on your server, allowing incoming web traffic to access your Express.js application.
8. Configure domain and DNS: If you have a custom domain, configure the DNS settings to point to your server's IP address. This will allow visitors to access your application using your domain.
9. Test the deployment: Once all the above steps are completed, access your Express.js application through the provided IP address or custom domain to ensure that it is working correctly.

Note: The above steps might vary slightly depending on your web hosting provider and server setup. It is recommended to refer to the documentation provided by your hosting provider for specific instructions related to their platform.