diff --git a/README.md b/README.md
index 8f1bc7c..1e54cdf 100644
--- a/README.md
+++ b/README.md
@@ -15,17 +15,28 @@
 
 ---
 
+## Rquirements
+
+- Node.js
+- Angular CLI
+
+## NPM Scripts
+
+| command          | description                                                     |
+|------------------|-----------------------------------------------------------------|
+| `npm run start`  | start development server on `http://localhost:4200/`            |
+| `npm run build`  | build production application and save to `./dist`               |
+| `npm run build:library` | build node module and save to `./dist/NlsGuilloche`      | 
+
 ## Development server
 
-Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
+Download dependencies with `npm i` or `yarn`.
 
-## Code scaffolding
-
-Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.
+Run `npm run start` for a dev server. Browser opens and navigates automatically to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
 
 ## Build
 
-Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
+Run `npm run build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
 
 ## Author