Seed Docs Update (#929)

* docs: update

* docs: update

* docs: update

* Update README.md

Author: LuisValgoi

README.md

@@ -112,8 +112,11 @@ For more info, check the [seed documentation](https://github.com/SAP/ui5-webcomp
 
 ```sh
 npx create-react-app my-app --template @ui5/webcomponents-react-seed
+npm run mock
+
 # or if you want to use yarn
 yarn create react-app my-app --template @ui5/webcomponents-react-seed
+yarn mock
 ```
 
 ### Add `@ui5/webcomponents-react` to an existing app

docs/1-Welcome.stories.mdx

@@ -52,8 +52,11 @@ For more info, check the [seed documentation](https://github.com/SAP/ui5-webcomp
 
 ```sh
 npx create-react-app my-app --template @ui5/webcomponents-react-seed
+npm run mock
+
 # or if you want to use yarn
 yarn create react-app my-app --template @ui5/webcomponents-react-seed
+yarn mock
 ```
 
 ### Add `@ui5/webcomponents-react` to an existing app

packages/cra-template-seed/README.md

@@ -9,10 +9,11 @@ This seed decrease’s the bootstrap time spent on new projects, POCs or MVPs wh
 # Usage
 ```shell script
 npx create-react-app my-app --template @ui5/webcomponents-react-seed
+npm run mock
 
 # or if you prefer to use yarn
-
 yarn create react-app my-app --template @ui5/webcomponents-react-seed
+yarn mock
 ```
 
 # Configuration Included