diff --git a/templates.d/nginx_rtmp/fqdn_context.env b/templates.d/nginx_rtmp/fqdn_context.env
index bf5e923..e28ad9f 100644
--- a/templates.d/nginx_rtmp/fqdn_context.env
+++ b/templates.d/nginx_rtmp/fqdn_context.env
@@ -8,6 +8,8 @@
 
 # Other available defaults
 # ALPINE_VERSION=latest
+# EXTERNAL_CONTAINER_PORT=1935
+# INTERNAL_CONTAINER_PORT=1935
 # NGINX_RTMP_GIT_URL=https://github.com/arut/nginx-rtmp-module
 # NGINX_RTMP_GIT_NAME=nginx-rtmp-module
 # RESTARTPOLICY=unless-stopped