How to unblock port 3001 and 3002

I have an app that has 3 different processes port 3000, 3001, 3002. I needed port 3000 to be mapped to port 443 (https) so the users don’t go to port 3000 to access the webpage. But the ports 3001, and 3002 are blocked. My current solution is to do open ports 3001, 3002 the same way as 3000, but that would not work as that will also map those ports to https.

Location block:

location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                proxy_pass http://localhost:3000; #whatever port your app runs on
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
        }