5238 set up basic docs structure (#5245)

* Add a temporary README file

This commit adds a temporary readme file that points users to the
main README file or the User Guide.

* Add a "getting started" doc

This commit adds a page for getting started, copying the
"Get started now" from the current `README.md`.

* Add link to the get started page from the index page

* Add the getting started doc to the site header

* Add footer link to getting started info

* Add getting started to the sidebar

* Add placeholder for the user guide page

* Add links to the user-guide page as well

* Add auto-generated i18n file

* Move all docusaurus related files into own folder

docusaurus/docs/README.md

+# Nothing to see here right now
+
+Please refer to the [Readme](https://github.com/facebook/create-react-app/blob/master/README.md) or the [User Guide](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md).

docusaurus/docs/getting-started.md

+---
+id: getting-started
+title: Getting started
+sidebar_label: Getting started
+---
+
+## Quick Overview
+
+```sh
+npx create-react-app my-app
+cd my-app
+npm start
+```
+
+_([npx](https://medium.com/@maybekatz/introducing-npx-an-npm-package-runner-55f7d4bd282b) comes with npm 5.2+ and higher, see [instructions for older npm versions](https://gist.github.com/gaearon/4064d3c23a77c74a3614c498a8bb1c5f))_
+
+Then open [http://localhost:3000/](http://localhost:3000/) to see your app.<br>
+When you’re ready to deploy to production, create a minified bundle with `npm run build`.
+
+<p align='center'>
+<img src='https://cdn.rawgit.com/facebook/create-react-app/27b42ac/screencast.svg' width='600' alt='npm start'>
+</p>
+
+### Get Started Immediately
+
+You **don’t** need to install or configure tools like Webpack or Babel.<br>
+They are preconfigured and hidden so that you can focus on the code.
+
+Just create a project, and you’re good to go.
+
+## Creating an App
+
+**You’ll need to have Node >= 6 on your local development machine** (but it’s not required on the server). You can use [nvm](https://github.com/creationix/nvm#installation) (macOS/Linux) or [nvm-windows](https://github.com/coreybutler/nvm-windows#node-version-manager-nvm-for-windows) to easily switch Node versions between different projects.
+
+To create a new app, you may choose one of the following methods:
+
+### npx
+
+```sh
+npx create-react-app my-app
+```
+
+_([npx](https://medium.com/@maybekatz/introducing-npx-an-npm-package-runner-55f7d4bd282b) comes with npm 5.2+ and higher, see [instructions for older npm versions](https://gist.github.com/gaearon/4064d3c23a77c74a3614c498a8bb1c5f))_
+
+### npm
+
+```sh
+npm init react-app my-app
+```
+
+_`npm init <initializer>` is available in npm 6+_
+
+### Yarn
+
+```sh
+yarn create react-app my-app
+```
+
+_`yarn create` is available in Yarn 0.25+_
+
+It will create a directory called `my-app` inside the current folder.<br>
+Inside that directory, it will generate the initial project structure and install the transitive dependencies:
+
+```
+my-app
+├── README.md
+├── node_modules
+├── package.json
+├── .gitignore
+├── public
+│   ├── favicon.ico
+│   ├── index.html
+│   └── manifest.json
+└── src
+    ├── App.css
+    ├── App.js
+    ├── App.test.js
+    ├── index.css
+    ├── index.js
+    ├── logo.svg
+    └── registerServiceWorker.js
+```
+
+No configuration or complicated folder structures, just the files you need to build your app.<br>
+Once the installation is done, you can open your project folder:
+
+```sh
+cd my-app
+```
+
+Inside the newly created project, you can run some built-in commands:
+
+### `npm start` or `yarn start`
+
+Runs the app in development mode.<br>
+Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
+
+The page will automatically reload if you make changes to the code.<br>
+You will see the build errors and lint warnings in the console.
+
+<p align='center'>
+<img src='https://cdn.rawgit.com/marionebl/create-react-app/9f62826/screencast-error.svg' width='600' alt='Build errors'>
+</p>
+
+### `npm test` or `yarn test`
+
+Runs the test watcher in an interactive mode.<br>
+By default, runs tests related to files changed since the last commit.
+
+[Read more about testing.](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#running-tests)
+
+### `npm run build` or `yarn build`
+
+Builds the app for production to the `build` folder.<br>
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.<br>
+
+Your app is ready to be deployed.

docusaurus/docs/user-guide.md

+---
+id: user-guide
+title: User guide
+sidebar_label: User guide
+---
+
+The user guide can be found on [GitHub](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md) for now.

website/core/Footer.js → docusaurus/website/core/Footer.js

@@ -34,11 +34,11 @@ class Footer extends React.Component {
           </a>
           <div>
             <h5>Docs</h5>
-            <a href={this.docUrl('doc1.html', this.props.language)}>
-              Getting Started (or other categories)
+            <a href={this.docUrl('getting-started', this.props.language)}>
+              Getting Started
             </a>
-            <a href={this.docUrl('doc2.html', this.props.language)}>
-              Guides (or other categories)
+            <a href={this.docUrl('user-guide', this.props.language)}>
+              User Guide
             </a>
             <a href={this.docUrl('doc3.html', this.props.language)}>
               API Reference (or other categories)

website/i18n/en.json → docusaurus/website/i18n/en.json

@@ -4,16 +4,26 @@
     "next": "Next",
     "previous": "Previous",
     "tagline": "Create React apps with no build configuration.",
-    "docs": {},
+    "docs": {
+      "getting-started": {
+        "title": "Getting started",
+        "sidebar_label": "Getting started"
+      },
+      "README": {
+        "title": "README"
+      },
+      "user-guide": {
+        "title": "User guide",
+        "sidebar_label": "User guide"
+      }
+    },
     "links": {
-      "Docs": "Docs",
-      "API": "API",
+      "Getting started": "Getting started",
       "Help": "Help"
     },
     "categories": {
-      "Docusaurus": "Docusaurus",
-      "First Category": "First Category",
-      "Second Category": "Second Category"
+      "Getting Started": "Getting Started",
+      "User Guide": "User Guide"
     }
   },
   "pages-strings": {

website/pages/en/index.js → docusaurus/website/pages/en/index.js

@@ -82,8 +82,10 @@ class HomeSplash extends React.Component {
           <ProjectTitle />
           <PromoSection>
             <Button href="#try">Try It Out</Button>
-            <Button href={docUrl('doc1.html', language)}>Example Link</Button>
-            <Button href={docUrl('doc2.html', language)}>Example Link 2</Button>
+            <Button href={docUrl('getting-started', language)}>
+              Get started
+            </Button>
+            <Button href={docUrl('user-guide', language)}>User guide</Button>
           </PromoSection>
         </div>
       </SplashContainer>

docusaurus/website/sidebars.json

+{
+  "docs": {
+    "Getting Started": ["getting-started"],
+    "User Guide": ["user-guide"]
+  }
+}

website/siteConfig.js → docusaurus/website/siteConfig.js

@@ -26,8 +26,7 @@ const siteConfig = {
 
   // For no header links in the top nav bar -> headerLinks: [],
   headerLinks: [
-    { doc: 'doc1', label: 'Docs' },
-    { doc: 'doc4', label: 'API' },
+    { doc: 'getting-started', label: 'Getting started' },
     { href: 'https://reactjs.org/community/support.html', label: 'Help' },
   ],
 

website/sidebars.json

-{
-  "docs": {
-    "Docusaurus": ["doc1"],
-    "First Category": ["doc2"],
-    "Second Category": ["doc3"]
-  },
-  "docs-other": {
-    "First Category": ["doc4", "doc5"]
-  }
-}