nginx reverse proxy to point a certain node aplication

nginx reverse proxy

/etc/nginx/nginx.conf
server {
    listen       80 default_server;
    listen       [::]:80 default_server;

    root /var/www/api

    location / {
        proxy_pass http://localhost:8080;
        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;
    }
}