webui: Add missing step to make install
diff --git a/webui/Makefile b/webui/Makefile
index 58c3373..d6e6d13 100644
--- a/webui/Makefile
+++ b/webui/Makefile
@@ -2,6 +2,7 @@
 
 install:
 	npm ci
+	npm run playwright-install
 
 demo:
 	npm run demo