Merge pull request #3389 from Kevin-K/docs-node-v14

docs: update local install example for node v14

docs/getting-started/create-an-app.md

@@ -14,7 +14,7 @@ need to run Backstage in your own environment.
 
 To create a Backstage app, you will need to have
 [Node.js](https://nodejs.org/en/download/) Active LTS Release installed
-(currently v12).
+(currently v14).
 
 Backstage provides a utility for creating new apps. It guides you through the
 initial setup of selecting the name of the app and a database for the backend.

docs/getting-started/running-backstage-locally.md

@@ -8,19 +8,19 @@ description: Documentation on How to run Backstage Locally
 
 - Node.js
 
-First make sure you are using Node.js with an Active LTS Release, currently v12.
+First make sure you are using Node.js with an Active LTS Release, currently v14.
 This is made easy with a version manager such as
 [nvm](https://github.com/nvm-sh/nvm) which allows for version switching.
 
 ```bash
 # Installing a new version
-nvm install 12
-> Downloading and installing node v12.18.3...
-> Now using node v12.18.3 (npm v6.14.6)
+nvm install 14
+> Downloading and installing node v14.15.1...
+> Now using node v14.15.1 (npm v6.14.8)
 
 # Checking your version
 node --version
-> v12.18.3
+> v14.15.1
 ```
 
 - Yarn