diff --git a/.gitignore b/.gitignore
index f9baab2..238cac4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /SWA-*/
 /.*-env
 /*-db
+/.hostname
diff --git a/Makefile b/Makefile
index fc8c7b3..f4564ee 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,8 @@ FRONTEND=swa-jodel/frontend:latest
 BACKEND=swa-jodel/backend:latest
 DATABASE=swa-jodel/database:latest
 
+include $(ROOT_DIR).hostname
+
 help:
 	@echo "[HELP]"
 	@echo "usage: make <command>"
@@ -46,7 +48,7 @@ frontend: gitsync
 
 .PHONY = backend
 backend: gitsync
-	docker buildx build --tag $(DOCKER_REGISTRY)$(BACKEND) --load $(ROOT_DIR)SWA-backend
+	docker buildx build --build-arg="KC_HOSTNAME=$(KC_HOSTNAME)" --tag $(DOCKER_REGISTRY)$(BACKEND) --load $(ROOT_DIR)SWA-backend
 
 .PHONY = database
 database: gitsync