Issue #3331712: Update README.md as per README.md format

README.md

 # JSON:API Extras
 
-This module provides extra functionality on top of JSON:API. You should not
-need this module to get an spec compliant JSON:API, this module is to
-customize the output of JSON:API.
+The JSON:API module in code provides zero configuration out of the box. Use JSON:API
+Extras to customize your API. JSON:API Extras provides a means to override and provide
+limited configurations to the default zero-configuration implementation provided by the
+JSON:API in Core.
 
-This module adds the following features:
+For a full description of the module, visit the
+[project page](https://www.drupal.org/project/jsonapi_extras).
 
-  - Allows you to customize the URL for your resource under the `/jsonapi`
-    prefix.
-  - Allows you to customize the resource type to other than
-    `${entityTypeId}--${bundle}`.
-  - Lets you remove fields from the JSON:API output.
+Submit bug reports and feature suggestions, or track changes in the
+[issue queue](https://www.drupal.org/project/issues/jsonapi_extras).
 
-TODO:
-  * Auto calculate the dependency of the provider of the entity type and
-  bundles in the configuration entity.
+
+## Table of contents
+
+- Requirements
+- Installation
+- Configuration
+- Maintainers
+
+
+## Requirements
+
+This module requires no modules outside of Drupal core.
+
+
+## Installation
+
+Install as you would normally install a contributed Drupal module. For further
+information, see
+[Installing Drupal Modules](https://www.drupal.org/docs/extending-drupal/installing-drupal-modules).
+
+
+## Configuration
+
+The module has no menu or modifiable settings. There is no configuration. When
+enabled, the module will prevent the links from appearing. To get the links
+back, disable the module and clear caches.
+
+
+## Maintainers
+
+- Mateu Aguiló Bosch - [e0ipso](https://www.drupal.org/u/e0ipso)
+- Björn Brala - [bbrala](https://www.drupal.org/u/bbrala)