docs(v2): add docs skeleton and structure (#1412)

* docs(v2): add docs skeleton and structure

* docs(v2): add on

* docs(v2): move motivation into contributing

packages/docusaurus/lib/default-theme/DocBody/index.js

@@ -45,12 +45,6 @@ function DocBody(props) {
       <div className="container margin-vert--lg">
         <div className="row">
           <div className="col col--8">
-            {/* TODO: remove this in the future */}
-            <div className="alert alert--warning" role="alert">
-              Docusaurus 2 is still <strong>work in progress</strong>. Do not
-              use it in production yet!
-            </div>
-            <br />
             <header>
               <h1 className="margin-bottom--lg">{metadata.title}</h1>
             </header>

packages/docusaurus/lib/default-theme/Navbar/index.js

@@ -95,15 +95,6 @@ function Navbar(props) {
               <Search {...props} />
             </div>
           )}
-          <div className="navbar__item">
-            <a
-              className="navbar__link"
-              href="https://github.com/facebook/docusaurus"
-              rel="noopener noreferrer"
-              target="_blank">
-              <i className="fab fa-github fa-lg" />
-            </a>
-          </div>
         </div>
       </div>
     </nav>

packages/docusaurus/lib/default-theme/Sidebar/index.js

@@ -36,7 +36,7 @@ function Sidebar(props) {
 
     if (!linkMetadata) {
       throw new Error(
-        `Improper sidebars.json file, document with id '${linkID}' not found.`,
+        `Improper sidebars file, document with id '${linkID}' not found.`,
       );
     }