How to setup a server with PHP and Node.js?

Hello, I’m new in DO and i’m trying to configure my server for deploy some apps.

I would like to set my DNS in my domain and redirect to my app in DO. And another thing, an app can run Node or PHP.

For example: app1.domain.com -> /home/myuser/www/app1 -> PHP app2.domain.com -> /home/myuser/www/app2 -> NODE app2.domain.com -> /home/myuser/www/app3 -> NODE

First, I installed PHP, Node and Nginx.

How can I modify the Nginx config file to make the redirects?

My Nginx file until now:

server {
    server_name app1.domain.com;
    root /home/myuser/www/app1;
}

PS: At this time, if i try to enter in my droplet ip (104.XXX.77.XX), i see the app1 html.

I’m thinking of something like this:

server {
    server_name app1.domain.com;
    root /home/myuser/www/app1;
}

server {
    server_name app2.domain.com;
    root /home/myuser/www/app2;
}

server {
    server_name app3.domain.com;
    root /home/myuser/www/app3;
}

Thanks!