I can see that I have only one server bloc enabled

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html;

    server_name http://159.89.55.168/ www.haltamah.app haltamah.app;

    location / {
        proxy_pass http://localhost:3000;
                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;
    }

}

# Virtual Host configuration for example.com
#server {
#   listen 80;
#   listen [::]:80;
#
#   server_name example.com;
#
#   root /var/www/example.com;
#   index index.html;
#
#   location / {
#       try_files $uri $uri/ =404;
#   }
#}