Update README file

Closes #3418040

README.md

+# Layout Builder Blocks
+
+Utilize [Bootstrap Styles](https://www.drupal.org/project/bootstrap_styles)
+module plugins to add different styling options for layout builder blocks. For
+example: background (color/image/video), typography (color/alignment), spacing
+(padding/margin) and many more!
+
+For a full description of the module, visit the
+[project page](https://www.drupal.org/project/layout_builder_blocks).
+
+Submit bug reports and feature suggestions, or track changes in the
+[issue queue](https://www.drupal.org/project/issues/layout_builder_blocks).
+
+
+## Table of contents
+
+- Requirements
+- Recommended modules
+- Installation
+- Configuration
+- How to Use
+- Maintainers
+
+
+## Requirements
+
+This module requires the following modules:
+
+- [Bootstrap Styles](https://www.drupal.org/project/bootstrap_styles)
+- [Media Library Form Element](https://www.drupal.org/project/media_library_form_element)
+
+
+## Recommended modules
+
+[Bootstrap Layout Builder](https://www.drupal.org/project/bootstrap_layout_builder)
+
+
+## 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
+
+1. Go to Administration » Configuration » Content authoring » Layout Builder
+   Blocks
+1. Enable/Disable fields
+
+
+## How to Use
+
+1. Add/Edit block in layout builder.
+1. Style tab is displaying on Configure Block section.
+1. Choose the block styles and save page.
+
+
+## Maintainers
+
+- Mahmoud Zayed - [mahmoud-zayed](https://www.drupal.org/u/mahmoud-zayed)
+- Rajab Natshah - [rajab-natshah](https://www.drupal.org/u/rajab-natshah)
+- Dowidar - [amira-dowidar](https://www.drupal.org/u/amira-dowidar)
+- Aaron Christian - [aaronchristian](https://www.drupal.org/u/aaronchristian)
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