md: add content

Author: pyjun01

README.md

@@ -1,21 +1,23 @@
 # 🛠🛠🛠 in development 🛠🛠🛠
 
-# React Google Map Wrapper
+# [React Google Map Wrapper](https://pyjun01.github.io/react-google-map-wrapper/) · [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/pyjun01/react-google-map-wrapper/blob/main/LICENSE) [![npm version](https://img.shields.io/npm/v/react-google-map-wrapper.svg?style=flat)](https://www.npmjs.com/package/react-google-map-wrapper)
 
 `react-google-map-wrapper` is a React component library for rendering Google Maps.
 
-## TO DO
-
-- [x] GoogleMapApiLoader
-- [x] GoogleMap
-- [x] Marker
-- [x] Custom Marker
-- [x] Controls
-- [x] InfoWindow
-- [x] Polyline
-- [x] Polygon
-- [x] Rectangle
-- [x] Circle
-- [x] AdvancedMarker
-- [x] MarkerClusterer
-- [x] HeatmapLayer
+You can see an example [here](https://pyjun01.github.io/react-google-map-wrapper/docs/examples/basic/).
+
+## Installation
+
+```bash
+npm install react-google-map-wrapper # or yarn add react-google-map-wrapper or pnpm add react-google-map-wrapper
+```
+
+## Documentation
+
+You can find the documentation [on the website.](https://pyjun01.github.io/react-google-map-wrapper)
+
+Check out the [Getting Started](https://pyjun01.github.io/react-google-map-wrapper/docs/introdution/) page for a quick overview.
+
+### License
+
+`react-google-map-wrapper` is [MIT licensed](https://github.com/pyjun01/react-google-map-wrapper/blob/main/LICENSE).