I want to set proxy pass on ec2 centos nginx server

Question

I need to configure nginx proxy pass on of localhost:4000 to domain/front and and localhost:3000 want to pass on domain/dev.

I have added the IP on godaddy and domain is working fine.

server {
        listen       80;
        #listen       [::]:80;
        server_name   domain.com;
#       server_name  _;
        root         /usr/share/nginx/html;

        include /etc/nginx/default.d/*.conf;


location / {
       #proxy_pass http://localhost:4000;
       proxy_pass domain.com:4000/api;
       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;
   }


        location /api/ {
                proxy_set_header   X-Forwarded-For $remote_addr;
                proxy_set_header   Host $http_host;
                proxy_pass  http://localhost:3000/;
        }

        # Load configuration files for the default server block.
        # include /etc/nginx/default.d/*.conf;

        error_page 404 /404.html;
        location = /404.html {
        }
}

I have tried with multiple things with proxy_set_header, with ec2 IP only but not working.

Can someone help me in that?