docs: Update CONTRIBUTING and README for WebUI development server setup and usage
diff --git a/webui/Makefile b/webui/Makefile
index 3c7c341..b95708e 100644
--- a/webui/Makefile
+++ b/webui/Makefile
@@ -7,6 +7,9 @@
 demo:
 	npm run demo
 
+dev:
+	npm run dev
+
 # TypeScript type checking
 # Note: The actual esbuild bundling happens in esbuild.go
 check: