diff --git a/docker/.env.example b/docker/.env.example
index 20f00f69d8..6fee8b4b3c 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -657,6 +657,7 @@ NGINX_KEEPALIVE_TIMEOUT=65
 NGINX_PROXY_READ_TIMEOUT=3600s
 NGINX_PROXY_SEND_TIMEOUT=3600s
 
+# Set true to accept requests for /.well-known/acme-challenge/
 NGINX_ENABLE_CERTBOT_CHALLENGE=false
 
 # ------------------------------