doc: fix UI build instructions

dubadub · web-flow · commit 02abf6f70dad · 2023-11-29T08:51:04.000Z
diff --git a/README.md b/README.md
@@ -162,7 +162,7 @@ On MacOS:
 4. Build UI server
 
 ```
-cd ui && npm run build
+cd ui && npm install && npm run build
 ```
 5. Build CookCLI from a directory with the source code:
 
