upstream host-backend-app {
    server template-backend-app:9000;
}

server {
    listen 80 default_server;

    location / {
        fastcgi_pass host-backend-app;
        fastcgi_index index.php;

        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME /var/www/html/public/index.php;
    }
}