Clarify creating a new plugin as the next step (#575)

* Move create-app docs out from getting started

* Add contributing to readme.md

docs/getting-started/README.md

@@ -1,9 +1,10 @@
 # Getting started with Backstage
 
-Here is a collection of tutorials that will guide you through setting up and extending an instance of Backstage with your own plugins.
+## Creating a Plugin
+
+The value of Backstage grows with every new plugin that gets added. Here is a collection of tutorials that will guide you through setting up and extending an instance of Backstage with your own plugins.
 
 - [Development Environment](development-environment.md)
-- [Create a Backstage App](create-an-app.md)
 - [Create a Backstage plugin](create-a-plugin.md)
 - [Structure of a plugin](structure-of-a-plugin.md)
 - Using Backstage components (TODO)

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

@@ -1,76 +0,0 @@
-# Backstage App
-
-To get set up quickly with your own Backstage project you can create a Backstage App.
-
-A Backstage App is a monorepo setup with `lerna` that includes everything you need to run Backstage in your own environment.
-
-## Create an app
-
-To create a Backstage app, you will need to have [NodeJS](https://nodejs.org/en/download/) Active LTS Release installed (currently v12).
-
-With `npx`:
-
-```bash
-npx @backstage/cli create-app
-```
-
-This will create a new Backstage App inside the current folder. The name of the app-folder is the name that was provided when prompted.
-
-<p align='center'>
-    <img src='https://github.com/spotify/backstage/raw/master/docs/getting-started/create-app_output.png' width='600' alt='create app'>
-</p>
-
-Inside that directory, it will generate all the files and folder structure needed for you to run your app.
-
-### Folder structure
-
-```
-app
-├── README.md
-├── lerna.json
-├── package.json
-├── prettier.config.js
-├── tsconfig.json
-├── packages
-│   └── app
-│       ├── package.json
-│       ├── tsconfig.json
-│       ├── public
-│       │   └──  ...
-│       └── src
-│           ├── App.test.tsx
-│           ├── App.tsx
-│           ├── index.tsx
-│           ├── plugins.ts
-│           └── setupTests.ts
-└── plugins
-    └── welcome
-        ├── README.md
-        ├── package.json
-        ├── tsconfig.json
-        └── src
-            ├── index.ts
-            ├── plugin.test.ts
-            ├── plugin.ts
-            ├── setupTests.ts
-            └── components
-                ├── Timer
-                │   └──  ...
-                └── WelcomePage
-                    └──  ...
-```
-
-## Run the app
-
-When the installation is complete you can open the app folder and start the app.
-
-```bash
-cd my-backstage-app
-yarn start
-```
-
-_When `yarn start` is ready it should open up a browser window displaying your app, if not you can navigate to `http://localhost:3000`._
-
-[Next Step - Create a Backstage plugin](create-a-plugin.md)
-
-[Back to Docs](README.md)

docs/getting-started/development-environment.md

@@ -34,4 +34,6 @@ Then open http://localhost/ on your browser.
 
 > See [package.json](/package.json) for other yarn commands/options.
 
+[Next Step - Create a Backstage plugin](create-a-plugin.md)
+
 [Back to Docs](README.md)