server {
    listen 80 default;
    client_max_body_size 308M;
    access_log /var/log/nginx/application.access.log;
    root /application/public;
    index index.php;
    if (!-e $request_filename) {
        rewrite ^.*$ /index.php last;
    }
    location ~ \.php$ {
        fastcgi_pass php-fpm:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME
         $document_root$fastcgi_script_name;
        fastcgi_param PHP_VALUE
         "error_log=/var/log/nginx/application_php_errors.log";
        fastcgi_buffers 16 16k;
        fastcgi_buffer_size 32k;
        include fastcgi_params;
    }
}

The previous file set port 80 as the default port for our web server and set port 9000 to php-fpm, which means that our containers in nginx will communicate with php-fpm through port 9000, and, for communicating with the web, will use the public view through port 80. Later on, in docker-compose.yml, we will configure the internal Docker container ports to the outside world, which, in this case, is our host machine.