added nginx configuration changes for the vhost

drupal/rootfs/etc/nginx/conf.d/default.conf

@@ -47,6 +47,9 @@ server {
 
     location / {
         # try_files $uri @rewrite; # For Drupal <= 6
+        proxy_buffer_size          512k;
+        proxy_buffers              8 256k;
+        proxy_busy_buffers_size    512k;
         try_files $uri /index.php?$query_string; # For Drupal >= 7
     }
 
@@ -90,7 +93,11 @@ server {
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         fastcgi_param PATH_INFO $fastcgi_path_info;
         fastcgi_param QUERY_STRING $query_string;
+        fastcgi_param HTTPS on;
+        fastcgi_param HTTP_SCHEME https;
         fastcgi_intercept_errors on;
+        fastcgi_buffers 16 16k;
+        fastcgi_buffer_size 32k;
         # PHP 7 socket location.
         fastcgi_pass unix:/var/run/php-fpm7/php-fpm7.sock;
     }
@@ -118,4 +125,4 @@ server {
     if ($request_uri ~* "^(.*/)index\.php(.*)") {
         return 307 $1$2;
     }
-}
+}