subdomains

events {
    worker_connections  8000;
    multi_accept on;
}

http {
    charset utf-8;
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    access_log /dev/stdout;
    error_log /dev/stderr;


    server {
        listen 80  reuseport;
        listen [::]:80  reuseport;
        server_name .localhost;

        location / {
            default_type text/html;
            return 200 '<a href="http://app1.localhost">app1</a><br /><a href="http://app2.localhost">app2</a><br /><a href="http://app3.localhost">app3</a>';
        }
    }

    server {
        listen 80;
        listen [::]:80;
        server_name app1.localhost;

        location / {
            default_type text/html;
            return 200 'app1';
        }
    }

    server {
        listen 80;
        listen [::]:80;
        server_name app2.localhost;

        location / {
            default_type text/html;
            return 200 'app2';
        }
    }

    server {
        listen 80;
        listen [::]:80;
        server_name app3.localhost;

        location / {
            default_type text/html;
            return 200 'app3';
        }
    }

}