Added the link to the live test site

Author: jimolina

README.md

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 COVID-19 Info Data. A simple Reactjs example code.
 
+Check how is working here: [https://jm-covid19-react-app.netlify.app/](https://jm-covid19-react-app.netlify.app/)
+
 ## Covid19 API:
 
 [https://about-corona.net/documentation](https://about-corona.net/documentation)