Update README.md

README.md

@@ -16,3 +16,39 @@ Current version is available at [Chrome web store](https://chrome.google.com/web
 ## Screenshot
 
 ![covid-stats-screenshot](https://repository-images.githubusercontent.com/274438498/99045180-c6ec-11ea-943a-ac294b0fbc1f)
+
+## Installation
+
+```
+git clone https://github.com/ashiishme/covid-stats.git
+yarn install
+```
+
+After all the packages are installed, 
+
+```
+yarn start
+```
+
+This extension can be tested as a normal web application directly on browser. If you want to test it as a chrome extension ( which you should ). You must enable the developer mode on your chrome browser so that it can allow you to upload unpacked extension for testing.
+
+Check the guide below to learn more:
+[Getting started with Chrome Extension](https://developer.chrome.com/extensions/getstarted)
+
+Now, once you are familiar with loading unpacked extenstion. You can build this project and upload the build for testing.
+
+```
+yarn build
+```
+
+## Contribute
+
+- Fork this repository
+- Create your own branch to make changes or fix the issues
+- Push changes to your fork & create a PR.
+
+Give this project a :star:, it motivates me :smile:.
+
+Check more about [contributing](https://github.com/ashiishme/covid-stats/blob/development/.github/CONTRIBUTING.md) guidelines. You must follow the guidelines in order to get your PR merged. If you are sending PR for `Hacktoberfest2020`, the PR must compile with the guidelines or it will be marked as `invalid`.
+
+[Code of Conduct](https://github.com/ashiishme/covid-stats/blob/development/.github/CODE_OF_CONDUCT.md)