Can't request POST method in NginX

Hi, I deploy node application on cloud and cloud use nginx for reverse proxy I can request GET method but I can't request POST method. Please help me.

My config

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

        root /var/www/html;

        server_name localhost;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                # try_files $uri $uri/ =404;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $http_host;
                proxy_set_header X-NginX-Proxy true;
                proxy_pass http://localhost:3000;
                proxy_redirect off;
        }
}

via Tanakorn Phoochaliaw