diff --git a/dockerfile b/dockerfile
index fad165d..ee455e2 100644
--- a/dockerfile
+++ b/dockerfile
@@ -1,5 +1,9 @@
 FROM ubuntu:22.04
 
+# set container hostname
+ARG LDAP_HOST=example.com
+ENV LDAP_HOST=${LDAP_HOST}
+
 # set non-interactive TERM for docker
 ENV DEBIAN_FRONTEND=noninteractive