Also compress SVG and ICO images in nginx (#17651)

dist/nginx.conf

@@ -50,7 +50,7 @@ server {
   gzip_comp_level 6;
   gzip_buffers 16 8k;
   gzip_http_version 1.1;
-  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml image/x-icon;
 
   add_header Strict-Transport-Security "max-age=31536000" always;