Fixing Internal Links (#5552)

* Fixing Internal Links

Internal links, like those found on [Available Scripts](https://facebook.github.io/create-react-app/docs/available-scripts)
use absolute urls and therefore link to https://facebook.github.io/docs/deployment instead of
https://facebook.github.io/create-react-app/docs/deployment.

* changing to markdown links and fixing various broken internal links

Author: ehfeng

docusaurus/docs/adding-a-css-modules-stylesheet.md

@@ -8,7 +8,7 @@ sidebar_label: Adding CSS Modules
 
 This project supports [CSS Modules](https://github.com/css-modules/css-modules) alongside regular stylesheets using the `[name].module.css` file naming convention. CSS Modules allows the scoping of CSS by automatically creating a unique classname of the format `[filename]\_[classname]\_\_[hash]`.
 
-> **Tip:** Should you want to preprocess a stylesheet with Sass then make sure to [follow the installation instructions](/docs/adding-a-sass-stylesheet) and then change the stylesheet file extension as follows: `[name].module.scss` or `[name].module.sass`.
+> **Tip:** Should you want to preprocess a stylesheet with Sass then make sure to [follow the installation instructions](adding-a-sass-stylesheet.md) and then change the stylesheet file extension as follows: `[name].module.scss` or `[name].module.sass`.
 
 CSS Modules let you use the same CSS class name in different files without worrying about naming clashes. Learn more about CSS Modules [here](https://css-tricks.com/css-modules-part-1-need/).
 

docusaurus/docs/adding-a-router.md

@@ -19,4 +19,4 @@ yarn add react-router-dom
 
 To try it, delete all the code in `src/App.js` and replace it with any of the examples on its website. The [Basic Example](https://reacttraining.com/react-router/web/example/basic) is a good place to get started.
 
-Note that [you may need to configure your production server to support client-side routing](/docs/deployments#serving-apps-with-client-side-routing) before deploying your app.
+Note that [you may need to configure your production server to support client-side routing](deployment.md#serving-apps-with-client-side-routing) before deploying your app.

docusaurus/docs/adding-a-sass-stylesheet.md

@@ -30,7 +30,7 @@ This will allow you to do imports like
 @import '~nprogress/nprogress'; // importing a css file from the nprogress node module
 ```
 
-> **Tip:** You can opt into using this feature with [CSS modules](/docs/adding-a-css-modules-stylesheet) too!
+> **Tip:** You can opt into using this feature with [CSS modules](adding-a-css-modules-stylesheet.md) too!
 
 > **Note:** You must prefix imports from `node_modules` with `~` as displayed above.
 

docusaurus/docs/adding-custom-environment-variables.md

@@ -3,13 +3,14 @@ id: adding-custom-environment-variables
 title: Adding Custom Environment Variables
 sidebar_label: Environment Variables
 ---
+
 > Note: this feature is available with `react-scripts@0.2.3` and higher.
 
 Your project can consume variables declared in your environment as if they were declared locally in your JS files. By
 default you will have `NODE_ENV` defined for you, and any other environment variables starting with
 `REACT_APP_`.
 
-**The environment variables are embedded during the build time**. Since Create React App produces a static HTML/CSS/JS bundle, it can’t possibly read them at runtime. To read them at runtime, you would need to load HTML into memory on the server and replace placeholders in runtime, just like [described here](/docs/injecting-data-from-the-server-into-the-page). Alternatively you can rebuild the app on the server anytime you change them.
+**The environment variables are embedded during the build time**. Since Create React App produces a static HTML/CSS/JS bundle, it can’t possibly read them at runtime. To read them at runtime, you would need to load HTML into memory on the server and replace placeholders in runtime, just like [described here](title-and-meta-tags.md#injecting-data-from-the-server-into-the-page). Alternatively you can rebuild the app on the server anytime you change them.
 
 > Note: You must create custom environment variables beginning with `REACT_APP_`. Any other variables except `NODE_ENV` will be ignored to avoid accidentally [exposing a private key on the machine that could have the same name](https://github.com/facebook/create-react-app/issues/865#issuecomment-252199527). Changing any environment variables will require you to restart the development server if it is running.
 
@@ -77,7 +78,7 @@ You can also access the environment variables starting with `REACT_APP_` in the
 Note that the caveats from the above section apply:
 
 - Apart from a few built-in variables (`NODE_ENV` and `PUBLIC_URL`), variable names must start with `REACT_APP_` to work.
-- The environment variables are injected at build time. If you need to inject them at runtime, [follow this approach instead](/docs/generating-dynamic-meta-tags-on-the-server).
+- The environment variables are injected at build time. If you need to inject them at runtime, [follow this approach instead](title-and-meta-tags.md#generating-dynamic-meta-tags-on-the-server).
 
 ## Adding Temporary Environment Variables In Your Shell
 

docusaurus/docs/advanced-configuration.md

@@ -3,15 +3,15 @@ id: advanced-configuration
 title: Advanced Configuration
 ---
 
-You can adjust various development and production settings by setting environment variables in your shell or with [.env](/docs/adding-development-environment-variables-in-env).
+You can adjust various development and production settings by setting environment variables in your shell or with [.env](adding-custom-environment-variables.md#adding-development-environment-variables-in-env).
 
 | Variable             | Development | Production | Usage                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | :------------------- | :---------: | :--------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | BROWSER              |   ✅ Used   | 🚫 Ignored | By default, Create React App will open the default system browser, favoring Chrome on macOS. Specify a [browser](https://github.com/sindresorhus/opn#app) to override this behavior, or set it to `none` to disable it completely. If you need to customize the way the browser is launched, you can specify a node script instead. Any arguments passed to `npm start` will also be passed to this script, and the url where your app is served will be the last argument. Your script's file name must have the `.js` extension.                                                                                                                                       |
 | HOST                 |   ✅ Used   | 🚫 Ignored | By default, the development web server binds to `localhost`. You may use this variable to specify a different host.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | PORT                 |   ✅ Used   | 🚫 Ignored | By default, the development web server will attempt to listen on port 3000 or prompt you to attempt the next available port. You may use this variable to specify a different port.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | HTTPS                |   ✅ Used   | 🚫 Ignored | When set to `true`, Create React App will run the development server in `https` mode.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
-| PUBLIC_URL           | 🚫 Ignored  |  ✅ Used   | Create React App assumes your application is hosted at the serving web server's root or a subpath as specified in [`package.json` (`homepage`)](/docs/deployment#building-for-relative-paths). Normally, Create React App ignores the hostname. You may use this variable to force assets to be referenced verbatim to the url you provide (hostname included). This may be particularly useful when using a CDN to host your application.                                                                                                                                                                                                                               |
+| PUBLIC_URL           | 🚫 Ignored  |  ✅ Used   | Create React App assumes your application is hosted at the serving web server's root or a subpath as specified in [`package.json` (`homepage`)](deployment#building-for-relative-paths). Normally, Create React App ignores the hostname. You may use this variable to force assets to be referenced verbatim to the url you provide (hostname included.md). This may be particularly useful when using a CDN to host your application.                                                                                                                                                                                                                                  |
 | CI                   |   ✅ Used   |  ✅ Used   | When set to `true`, Create React App treats warnings as failures in the build. It also makes the test runner non-watching. Most CIs set this flag by default.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 | REACT_EDITOR         |   ✅ Used   | 🚫 Ignored | When an app crashes in development, you will see an error overlay with clickable stack trace. When you click on it, Create React App will try to determine the editor you are using based on currently running processes, and open the relevant source file. You can [send a pull request to detect your editor of choice](https://github.com/facebook/create-react-app/issues/2636). Setting this environment variable overrides the automatic detection. If you do it, make sure your systems [PATH](<https://en.wikipedia.org/wiki/PATH_(variable)>) environment variable points to your editor’s bin folder. You can also set it to `none` to disable it completely. |
 | CHOKIDAR_USEPOLLING  |   ✅ Used   | 🚫 Ignored | When set to `true`, the watcher runs in polling mode, as necessary inside a VM. Use this option if `npm start` isn't detecting changes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |

docusaurus/docs/alternatives-to-ejecting.md

@@ -3,4 +3,4 @@ id: alternatives-to-ejecting
 title: Alternatives to Ejecting
 ---
 
-[Ejecting](/docs/available-scripts#npm-run-eject) lets you customize anything, but from that point on you have to maintain the configuration and scripts yourself. This can be daunting if you have many similar projects. In such cases instead of ejecting we recommend to _fork_ `react-scripts` and any other packages you need. [This article](https://auth0.com/blog/how-to-configure-create-react-app/) dives into how to do it in depth. You can find more discussion in [this issue](https://github.com/facebook/create-react-app/issues/682).
+[Ejecting](available-scripts.md#npm-run-eject) lets you customize anything, but from that point on you have to maintain the configuration and scripts yourself. This can be daunting if you have many similar projects. In such cases instead of ejecting we recommend to _fork_ `react-scripts` and any other packages you need. [This article](https://auth0.com/blog/how-to-configure-create-react-app/) dives into how to do it in depth. You can find more discussion in [this issue](https://github.com/facebook/create-react-app/issues/682.md).

docusaurus/docs/available-scripts.md

@@ -14,15 +14,15 @@ The page will reload if you make edits. You will also see any lint errors in the
 
 ## `npm test`
 
-Launches the test runner in the interactive watch mode. See the section about [running tests](/docs/running-tests) for more information.
+Launches the test runner in the interactive watch mode. See the section about [running tests](running-tests.md) for more information.
 
 ## `npm run build`
 
 Builds the app for production to the `build` folder. 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. Your app is ready to be deployed!
 
-See the section about [deployment](/docs/deployment) for more information.
+See the section about [deployment](deployment.md) for more information.
 
 ## `npm run eject`
 

docusaurus/docs/deployment.md

@@ -79,11 +79,11 @@ If you’re using [Apache Tomcat](http://tomcat.apache.org/), you need to follow
 
 Now requests to `/todos/42` will be handled correctly both in development and in production.
 
-On a production build, and when you've [opted-in](/docs/making-a-progressive-web-app#why-opt-in),
+On a production build, and when you've [opted-in](making-a-progressive-web-app.md#why-opt-in),
 a [service worker](https://developers.google.com/web/fundamentals/primers/service-workers/) will automatically handle all navigation requests, like for
 `/todos/42`, by serving the cached copy of your `index.html`. This
 service worker navigation routing can be configured or disabled by
-[`eject`ing](/docs/available-scripts#npm-run-eject) and then modifying the
+[`eject`ing](available-scripts.md#npm-run-eject) and then modifying the
 [`navigateFallback`](https://github.com/GoogleChrome/sw-precache#navigatefallback-string)
 and [`navigateFallbackWhitelist`](https://github.com/GoogleChrome/sw-precache#navigatefallbackwhitelist-arrayregexp)
 options of the `SWPreachePlugin` [configuration](../config/webpack.config.prod.js).

docusaurus/docs/making-a-progressive-web-app.md

@@ -73,7 +73,7 @@ following into account:
    If your production web server does not support HTTPS, then the service worker
    registration will fail, but the rest of your web app will remain functional.
 
-1. The service worker is only enabled in the [production environment](/docs/deployment),
+1. The service worker is only enabled in the [production environment](deployment.md),
    e.g. the output of `npm run build`. It's recommended that you do not enable an
    offline-first service worker in a development environment, as it can lead to
    frustration when previously cached assets are used and do not include the latest
@@ -82,12 +82,12 @@ following into account:
 1. If you _need_ to test your offline-first service worker locally, build
    the application (using `npm run build`) and run a simple http server from your
    build directory. After running the build script, `create-react-app` will give
-   instructions for one way to test your production build locally and the [deployment instructions](/docs/deployment) have
+   instructions for one way to test your production build locally and the [deployment instructions](deployment.md) have
    instructions for using other methods. _Be sure to always use an
    incognito window to avoid complications with your browser cache._
 
 1. By default, the generated service worker file will not intercept or cache any
-   cross-origin traffic, like HTTP [API requests](/docs/integrating-with-an-api-backend),
+   cross-origin traffic, like HTTP [API requests](integrating-with-an-api-backend.md),
    images, or embeds loaded from a different domain.
 
 ## Progressive Web App Metadata

docusaurus/docs/proxying-api-requests-in-development.md

@@ -38,7 +38,7 @@ If the `proxy` option is **not** flexible enough for you, alternatively you can:
 
 - [Configure the proxy yourself](#configuring-the-proxy-manually)
 - Enable CORS on your server ([here’s how to do it for Express](http://enable-cors.org/server_expressjs.html)).
-- Use [environment variables](/docs/adding-custom-environment-variables) to inject the right server host and port into your app.
+- Use [environment variables](adding-custom-environment-variables.md) to inject the right server host and port into your app.
 
 ## "Invalid Host Header" Errors After Configuring Proxy
 

docusaurus/docs/setting-up-your-editor.md

@@ -63,7 +63,7 @@ Then add the block below to your `launch.json` file and put it inside the `.vsco
 }
 ```
 
-> Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](/docs/advanced-configuration).
+> Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](advanced-configuration.md).
 
 Start your app by running `npm start`, and start debugging in VS Code by pressing `F5` or by clicking the green debug icon. You can now write code, set breakpoints, make changes to the code, and debug your newly modified code—all from your editor.
 
@@ -75,7 +75,7 @@ You would need to have [WebStorm](https://www.jetbrains.com/webstorm/) and [JetB
 
 In the WebStorm menu `Run` select `Edit Configurations...`. Then click `+` and select `JavaScript Debug`. Paste `http://localhost:3000` into the URL field and save the configuration.
 
-> Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](/docs/advanced-configuration).
+> Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](advanced-configuration.md).
 
 Start your app by running `npm start`, then press `^D` on macOS or `F9` on Windows and Linux or click the green debug icon to start debugging in WebStorm.