docs: flowtype.org -> flow.org (#4881)

Author: Eugene Kopich

packages/react-scripts/template/README.md

@@ -218,7 +218,7 @@ In addition to [ES6](https://github.com/lukehoban/es6features) syntax features,
 * [Object Rest/Spread Properties](https://github.com/tc39/proposal-object-rest-spread) (ES2018).
 * [Dynamic import()](https://github.com/tc39/proposal-dynamic-import) (stage 3 proposal)
 * [Class Fields and Static Properties](https://github.com/tc39/proposal-class-public-fields) (part of stage 3 proposal).
-* [JSX](https://facebook.github.io/react/docs/introducing-jsx.html) and [Flow](https://flowtype.org/) syntax.
+* [JSX](https://facebook.github.io/react/docs/introducing-jsx.html) and [Flow](https://flow.org/) syntax.
 
 Learn more about [different proposal stages](https://babeljs.io/docs/plugins/#presets-stage-x-experimental-presets-).
 
@@ -886,20 +886,20 @@ Here is an example of adding a [customized Bootstrap](https://medium.com/@tacoma
 
 Flow is a static type checker that helps you write code with fewer bugs. Check out this [introduction to using static types in JavaScript](https://medium.com/@preethikasireddy/why-use-static-types-in-javascript-part-1-8382da1e0adb) if you are new to this concept.
 
-Recent versions of [Flow](http://flowtype.org/) work with Create React App projects out of the box.
+Recent versions of [Flow](https://flow.org/) work with Create React App projects out of the box.
 
 To add Flow to a Create React App project, follow these steps:
 
 1. Run `npm install --save flow-bin` (or `yarn add flow-bin`).
 2. Add `"flow": "flow"` to the `scripts` section of your `package.json`.
-3. Run `npm run flow init` (or `yarn flow init`) to create a [`.flowconfig` file](https://flowtype.org/docs/advanced-configuration.html) in the root directory.
+3. Run `npm run flow init` (or `yarn flow init`) to create a [`.flowconfig` file](https://flow.org/en/docs/config/) in the root directory.
 4. Add `// @flow` to any files you want to type check (for example, to `src/App.js`).
 
 Now you can run `npm run flow` (or `yarn flow`) to check the files for type errors.
 You can optionally use an IDE like [Nuclide](https://nuclide.io/docs/languages/flow/) for a better integrated experience.
 In the future we plan to integrate it into Create React App even more closely.
 
-To learn more about Flow, check out [its documentation](https://flowtype.org/).
+To learn more about Flow, check out [its documentation](https://flow.org/).
 
 ## Adding a Router