Fix broken links on website and github readme

Summary:
The url for the getting started page was changed yesterday. (no longer getting-started.html)
This fixes some links that were broken because of it.

Reviewed By: cekkaewnumchai

Differential Revision: D20855343

fbshipit-source-id: 788efb75f3581e4fe6cecd5f69f11dd64b03e7df

README.md

@@ -50,7 +50,7 @@ This repository includes all parts of Flipper. This includes:
 
 # Getting started
 
-Please refer to our [Getting Started guide](https://fbflipper.com/docs/getting-started.html) to set up Flipper.
+Please refer to our [Getting Started guide](https://fbflipper.com/docs/getting-started/) to set up Flipper.
 
 ## Requirements
 

desktop/app/src/MenuBar.tsx

@@ -360,9 +360,7 @@ function getTemplate(
         {
           label: 'Getting started',
           click: function () {
-            shell.openExternal(
-              'https://fbflipper.com/docs/getting-started.html',
-            );
+            shell.openExternal('https://fbflipper.com/docs/getting-started/');
           },
         },
         {

desktop/app/src/chrome/WelcomeScreen.tsx

@@ -166,9 +166,7 @@ export default class WelcomeScreen extends PureComponent<Props, State> {
           <Item
             onClick={() =>
               shell &&
-              shell.openExternal(
-                'https://fbflipper.com/docs/getting-started.html',
-              )
+              shell.openExternal('https://fbflipper.com/docs/getting-started/')
             }>
             <Icon size={20} name="tools" color={brandColors.Flipper} />
             <FlexColumn>

docs/troubleshooting.md

@@ -40,7 +40,7 @@ On a terminal, run the following:
 ```bash
 adb shell am start -n <APP_PACKAGE>/com.facebook.flipper.android.diagnostics.FlipperDiagnosticActivity
 ```
-This will only work if you added `FlipperDiagnosticActivity` to your `AndroidManifest.xml`. See [getting started](getting-started.html) for help.
+This will only work if you added `FlipperDiagnosticActivity` to your `AndroidManifest.xml`. See [getting started](getting-started/) for help.
 
 #### iOS
 You'll need to manually add this [ViewController](https://github.com/facebook/flipper/blob/master/iOS/FlipperKit/FlipperDiagnosticsViewController.m) to your app to see the in-app diagnostics.
@@ -91,7 +91,7 @@ debugImplementation('com.facebook.flipper:flipper:*') {
 
 ### Build errors in React Native
 
-If you experience errors such as `Undefined symbol: associated type descriptor for FloatLiteralType` or `Undefined symbol: __swift_FORCE_LOAD_$_swiftCompatibility50` after going through the [Getting Started](/docs/getting-started.html) tutorial you must do as follows:
+If you experience errors such as `Undefined symbol: associated type descriptor for FloatLiteralType` or `Undefined symbol: __swift_FORCE_LOAD_$_swiftCompatibility50` after going through the [Getting Started](/docs/getting-started/) tutorial you must do as follows:
 
 1. Open your project in Xcode;
 1. Click in your project's name on the left side;

website/core/Footer.js

@@ -36,7 +36,7 @@ class Footer extends React.Component {
           </a>
           <div>
             <h5>Docs</h5>
-            <a href="/docs/getting-started.html">Getting Started</a>
+            <a href="/docs/getting-started/">Getting Started</a>
             <a href="/docs/extending/js-setup.html">Creating Plugins</a>
           </div>
           <div>

website/pages/en/index.js

@@ -17,10 +17,10 @@ class Index extends React.Component {
           <div className="content">
             <h1>Extensible mobile app&nbsp;debugger</h1>
             <h2>
-              Flipper is a platform for debugging iOS, Android
-              and React Native apps. Visualize, inspect, and control your apps
-              from a simple desktop interface. Use Flipper as is or extend it
-              using the plugin API.
+              Flipper is a platform for debugging iOS, Android and React Native
+              apps. Visualize, inspect, and control your apps from a simple
+              desktop interface. Use Flipper as is or extend it using the plugin
+              API.
             </h2>
             <div className="row">
               <p
@@ -128,7 +128,7 @@ class Index extends React.Component {
           </div>
         </div>
         <div className="wrapper landing-cta">
-          <a href="/docs/getting-started.html" className="landing-btn primary">
+          <a href="/docs/getting-started/" className="landing-btn primary">
             Integrate Flipper In Your App
           </a>
           <a