feat: add tutorial (#1381)

* feat: add tutorial

* feat: complete tutorial

* Fix link

docs/tutorial-create-new-site.md

@@ -0,0 +1,62 @@
+---
+id: tutorial-create-new-site
+title: Create a New Site
+---
+
+In this section we'll get our Docusaurus site up and running for local development. The process takes less than a few minutes.
+
+<img alt="Docusaurus browser" src="/img/undraw_docusaurus_browser.svg" style="max-width: 400px; margin: 3rem auto"/>
+
+## Scaffold the Site
+
+1. Execute the `docusaurus-init` command.
+
+The following contents will be created for you in the directory you are in (TODO).
+
+```sh
+├── Dockerfile
+├── docker-compose.yml
+├── docs-examples-from-docusaurus
+│   ├── doc1.md
+│   ├── doc2.md
+│   ├── doc3.md
+│   ├── exampledoc4.md
+│   └── exampledoc5.md
+└── website
+    ├── README.md
+    ├── blog-examples-from-docusaurus
+    │   ├── 2016-03-11-blog-post.md
+    │   ├── 2017-04-10-blog-post-two.md
+    │   ├── 2017-09-25-testing-rss.md
+    │   ├── 2017-09-26-adding-rss.md
+    │   └── 2017-10-24-new-version-1.0.0.md
+    ├── core
+    │   └── Footer.js
+    ├── package.json
+    ├── pages
+    │   └── en
+    │       ├── help.js
+    │       ├── index.js
+    │       └── users.js
+    ├── sidebars.json
+    ├── siteConfig.js
+    ├── static
+    │   ├── css
+    │   │   └── custom.css
+    │   └── img
+    │       ├── docusaurus.svg
+    │       ├── favicon
+    │       │   └── favicon.ico
+    │       ├── favicon.png
+    │       └── oss_logo.png
+    └── yarn.lock
+```
+
+There would be some example documentation and blog pages generated.
+
+2. Run `cd website` to go into the `website` directory.
+1. Run `npm start` or `yarn start`.
+
+A browser window will open up at http://localhost:3000.
+
+Congratulations, you have just made your first Docusaurus site! Click around the pages generated for you to see what's available.