how to configure Nginx for multiple domains and sundomains on Ec2 instance with default amazon ami

nginx-subdomain-and-multiple-domains.conf

  server
{
  server_name mysite.com; #first domain
  root /var/www/html;
  index index.php index.html index.htm;
  error_page 404 /404.html;
  location / 
  {
     try_files $uri $uri/ /index.php?q=$uri&$args; # this rewrite rule is for wordpress blog
  }
  location ~\.php$
  {
	#fastcgi_pass unix:/var/run/php/php-fpm.sock; # uncomment if you are using socket
	fastcgi_pass localhost:9000;     
        fastcgi_index index.php;
        fastcgi_param  SCRIPT_FILENAME  /var/www/html$fastcgi_script_name;
        include fastcgi_params;
   }
}
############################## For subdomain #########################################
server 
{
  server_name subdomain.mysite.com; 
  root /var/www/html/subdomainfolder/;
  index index.html index.htm index.php;
  location / 
  {
    try_files $uri $uri/ /index.php?$query_string;
  }
  location ~\.php$ 
  {
	fastcgi_pass localhost:9000;
	fastcgi_index index.php;
	fastcgi_param SCRIPT_FILENAME /var/www/html/api/public$fastcgi_script_name;
	include fastcgi_params;
  } 
}
  
  ############################## For another domain #################################
  server 
{
  server_name anotherdomain.com *.anotherdomain.com; 
  root /var/www/html/anotherdomain.com;
  index  index.html index.htm index.php;
  location / 
   {
    #try_files $uri $uri/ /index.php?$query_string;
   }
  location ~\.php$ 
  {
	fastcgi_pass localhost:9000;
	fastcgi_index index.php;
	fastcgi_param SCRIPT_FILENAME /var/www/html/anotherdomain.com$fastcgi_script_name;
	include fastcgi_params;
  } 
}