Merge internal and external troubleshooting pages into one with optional internal-only content

Summary: Merged internal and external troubleshooting pages into one with optional internal-only content

Reviewed By: mweststrate

Differential Revision: D23651656

fbshipit-source-id: 330dd4b5cb49ae403a0a3760c1e23e30e56ad190

docs/getting-started/index.mdx

@@ -2,7 +2,6 @@
 id: index
 title: Desktop App
 ---
-import useBaseUrl from '@docusaurus/useBaseUrl';
 import FBContent from '../../website/src/components/FBContent';
 
 Flipper helps you debug Android and iOS apps running in an emulator/simulator or connected physical development devices. Flipper consists of two parts:

docs/troubleshooting.mdx

@@ -5,6 +5,7 @@ sidebar_label: Troubleshooting Issues
 ---
 import useBaseUrl from '@docusaurus/useBaseUrl';
 import Link from '@docusaurus/Link';
+import FBContent from '../website/src/components/FBContent';
 
 We hope that flipper works well out of the box, but the software is a work in progress and problems will occur. Below are some known issues and steps you can take to try to resolve them.
 
@@ -165,3 +166,9 @@ If you experience errors such as `Undefined symbol: associated type descriptor f
    <img alt="Screenshot showing the places mentioned in the last steps" src={useBaseUrl("img/troubleshooting-react-native-ios-swift-2.png")} />
 
 1. Now you can run your build normally.
+
+## Facebook-specific issues
+
+<FBContent 
+  internal={() => require('./fb/troubleshooting.mdx')} 
+  external={"Luckily you're in Open Source, so you don't have to worry about this stuff."} />

website/sidebars.js

@@ -98,7 +98,6 @@ module.exports = {
   },
   'fb-internal': {
     'FB Internal': fbInternalOnly([      
-      'fb/troubleshooting',
       'fb/Add-flipper-to-android-app',
       'fb/Adding-flipper-to-ios-app',
       'fb/LauncherConfig',

website/src/components/FBContent.jsx

@@ -17,6 +17,9 @@ function createElement(createElement) {
   if (React.isValidElement(createElement)) {
     return createElement;
   }
+  if (typeof createElement === 'string') {
+    return createElement;
+  }
   const element = createElement();
   if (React.isValidElement(element)) {
     return element;