Update README.md

Signed-off-by: Eric Chavez <[email protected]>

README.md

@@ -114,6 +114,17 @@ Tests
 -------
  - See [Test Folder](test/README.md) 
 
+## How to contribute <img src="https://electroniccats.com/wp-content/uploads/2018/01/fav.png" height="35"><img src="https://raw.githubusercontent.com/gist/ManulMax/2d20af60d709805c55fd784ca7cba4b9/raw/bcfeac7604f674ace63623106eb8bb8471d844a6/github.gif" height="30">
+ Contributions are welcome! 
+
+Please read the document  [**Contribution Manual**](https://github.com/ElectronicCats/electroniccats-cla/blob/main/electroniccats-contribution-manual.md)  which will show you how to contribute your changes to the project.
+
+✨ Thanks to all our [contributors](https://github.com/ElectronicCats/Beelan-LoRaWAN/graphs/contributors)! ✨
+
+See  [**_Electronic Cats CLA_**](https://github.com/ElectronicCats/electroniccats-cla/blob/main/electroniccats-cla.md) for more information.
+
+See the [**community code of conduct**](https://github.com/ElectronicCats/electroniccats-cla/blob/main/electroniccats-community-code-of-conduct.md)   for a vision of the community we want to build and what we expect from it.
+
 Maintainer
 -------