Node media server (RTMP) NGINX config

Hello,

I had a node media server running on a DO droplet and it was working as expected but now I want to migrate all my services to a different droplet because I have other domains running on the first droplet so the problem is the following:

I have: example.com example2.com example3.com

when I run node media server all domains can access the rmtp and I want only example.com to access it.

My idea was to use a reverse proxy for all my services this way:

server {
    server_name rtmp.example.com www.rtmp.example.com;

    location / {
      # First attempt to serve request as file, then
      # as directory, then fall back to displaying a 404.
      # try_files $uri $uri/ =404;
	    proxy_pass http://localhost:3003/;
            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;
    }

}

server {
    server_name api.example.com www.api.example.com;

    location / {
      # First attempt to serve request as file, then
      # as directory, then fall back to displaying a 404.
      # try_files $uri $uri/ =404;
	    proxy_pass http://localhost:3001/;
            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;
    }
}

But it is not working and I think nginx is blocking the rtmp protocol.

Do you know how can I enable rtmp traffic