diff --git a/static/nginx.conf b/static/nginx.conf
index 69dda8b..9aea74c 100644
--- a/static/nginx.conf
+++ b/static/nginx.conf
@@ -11,6 +11,7 @@ events {
         use epoll;
 }
 
+# https://docs.nginx.com/nginx/admin-guide/dynamic-modules/brotli/
 load_module modules/ngx_http_brotli_filter_module.so; # for compressing responses on-the-fly
 load_module modules/ngx_http_brotli_static_module.so; # for serving pre-compressed files