diff --git a/.env.example b/.env.example
index ffe333a..bc3417b 100644
--- a/.env.example
+++ b/.env.example
@@ -2,3 +2,5 @@
 EXHIBIT_MODE=dev
 # required when EXHIBIT_MODE=final:
 ADMIN_PASSWORD=change-me
+# public port on the host (container always listens on 33044 internally)
+HOST_PORT=33044