Add README badges (#122)

Author: bourdakos1

README.md

@@ -1,9 +1,27 @@
-# Docusaurus OpenAPI (beta)
+<h1 align="center">Docusaurus OpenAPI (beta)</h1>
+
+<div align="center">
 
 OpenAPI plugin for generating API reference docs in Docusaurus v2.
 
+[![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/cloud-annotations/docusaurus-plugin-openapi/blob/HEAD/LICENSE)
+[![npm latest package](https://img.shields.io/npm/v/docusaurus-preset-openapi/latest.svg)](https://www.npmjs.com/package/docusaurus-preset-openapi)
+[![npm downloads](https://img.shields.io/npm/dm/docusaurus-plugin-openapi.svg)](https://www.npmjs.com/package/docusaurus-preset-openapi)
+[![build](https://github.com/cloud-annotations/docusaurus-plugin-openapi/actions/workflows/validate.yaml/badge.svg)](https://github.com/cloud-annotations/docusaurus-plugin-openapi/actions/workflows/validate.yaml)
+
+[![prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
+[![Cypress.io](https://img.shields.io/badge/tested%20with-Cypress-04C38E.svg)](https://www.cypress.io/)
+[![jest](https://jestjs.io/img/jest-badge.svg)](https://github.com/facebook/jest)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/cloud-annotations/docusaurus-plugin-openapi/blob/HEAD/CONTRIBUTING.md#pull-requests)
+
+</div>
+
+<p align="center">
+
 ![](https://user-images.githubusercontent.com/4212769/85324376-b9e3d900-b497-11ea-9765-c42a8ad1ff61.png)
 
+</p>
+
 > ### 💥 [Breaking Changes](https://github.com/cloud-annotations/docusaurus-plugin-openapi/releases/tag/v0.2.0): v0.1.0 -> v0.2.0
 
 ## Preset usage