Modification of README.MD

Author: Thomas CRATER

README.md

@@ -28,3 +28,7 @@ You can check out [the Next.js GitHub repository](https://github.com/vercel/next
 The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
 
 Check out our [Next.js deployment documentation](https://nextjs.org/docs/pages/building-your-application/deploying) for more details.
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+## Coverage
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+[![codecov](https://codecov.io/gh/thom-cr/documentation-generator/graphs/tree.svg?token=iPKvKDwdvB)](https://codecov.io/gh/thom-cr/documentation-generator)