How to point a port to a subdomain?
I'm running ubuntu on a digitalocean server, and I have a web app rutting on port 3001. Basically, how my site is currently setup, I have to go to mydomain.com:3001 to reach the web app. I'd like to make it use app.mydomain.com instead. Is there any possible solution for this? I'm new to hosting and subdomains.
Thank you in advance! :)