chore: add comment in nginx config

Author: json-q

Docker/nginx.conf

@@ -67,7 +67,7 @@ server {
   listen 443 ssl;
   http2 on;
   server_name img.test.com www.img.test.com;
-  ssl_certificate "/etc/nginx/ssl/test.com_ecc/test.com.cer";
+  ssl_certificate "/etc/nginx/ssl/test.com_ecc/test.com.cer"; # fullchain.cer (this file is recommended)
   ssl_certificate_key "/etc/nginx/ssl/test.com_ecc/test.com.key";
   ssl_session_cache shared:SSL:1m;
   ssl_session_timeout 10m;