First of all, ProxyPass is a configuration set that allows you to run Node.js applications on different IP ports on your server, provided that you are already using a server engine like Apache. If you want to work with Node.js professionally, in my personal opinion, these settings are necessary.

Of course, there may be different solutions, but you can easily route subdomains or regular domains to the desired port in this way. To do this, you need to add the following code to your configuration file, adjusting it to the port you want to run your application on, after the servername and other information in the virtual host section:

ProxyPass / http://localhost:3000/
ProxyPassReverse / http://localhost:3000/

Here, I used port 3000 as an example. You can also replace "localhost" with your server's IP or internal IP. If you're using Nginx, the settings are a bit different but follow a similar pattern. I might touch on that in future articles.

You don't need to make your Node.js app listen on port 3000 where you are running it. Instead, you can route it to this port using the standard 80 or 8080 listen, which allows you to conserve energy with multiple listeners and work with just one setting for domain or subdomain-based operations.

Stay tuned for more articles in our brand new Node.js category!