docs(nx): add --ignore-existing to all npx commands

docs/getting-started/getting-started.md

@@ -13,7 +13,7 @@ npm install -g @angular/cli
 **Using `npx`**
 
 ```bash
-npx create-nx-workspace myworkspace
+npx --ignore-existing create-nx-workspace myworkspace
 ```
 
 **Using `npm init`**

docs/guides/react-and-angular.md

@@ -11,7 +11,7 @@ To show how Nx does it, let's build two applications (one in Angular, and one in
 Let's start by creating a new Nx workspace. The easiest way to do this is to use npx.
 
 ```bash
-npx create-nx-workspace happynrwl --preset=empty
+npx --ignore-existing create-nx-workspace happynrwl --preset=empty
 ```
 
 ## Creating an Angular Application

docs/guides/react.md

@@ -16,13 +16,13 @@ Nx has first class support for React: you can create React applications and libr
 Create a new Nx workspace. The easiest way to do it is to use npx.
 
 ```bash
-npx create-nx-workspace happynrwl --preset=empty
+npx --ignore-existing create-nx-workspace happynrwl --preset=empty
 ```
 
 You can also create a workspace with a React application in place by running:
 
 ```bash
-npx create-nx-workspace happynrwl --preset=react
+npx --ignore-existing create-nx-workspace happynrwl --preset=react
 ```
 
 ## Generating a React Application

docs/tutorial/01-create-application.md

@@ -7,7 +7,7 @@ In this tutorial you will use Nx to build a full-stack application out of common
 **Start by creating a new workspace.**
 
 ```bash
-npx create-nx-workspace myorg
+npx --ignore-existing create-nx-workspace myorg
 ```
 
 When asked about 'preset', select `empty`.