Add the CONTRIBUTING.md file

CONTRIBUTING.md

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+## Contributing
+
+As you guess we enjoy any contribution! You will find below how you can help the Kitsu project to get better.
+
+
+## Spread the word
+
+Making the project more visible helps a lot and doesn't takes much of your time. 
+For that, you have several ways to contribute:
+
+- Star the [Github](https://github.com/cgwire/kitsu) repository.
+- Follow our [X account](https://github.com/cgwire/kitsu).
+- Follow our [Linkedin account](https://www.linkedin.com/company/cgwire/).
+- Download our [trial Docker image](https://hub.docker.com/r/cgwire/cgwire).
+- Write a social media post about us.
+- Write a blog post about us.
+- Talk about Kitsu to your colleagues and friends.
+
+
+## Meet the community
+
+Our community chat and forum is available on Discord. The topics discussed are wider 
+than Kitsu discussion, they cover everything related to pipelines.
+The community support for Kitsu is avalaible here too. Everyone is very friendly and would
+be glad to meet you!
+
+[Join the Animation/VFX Pipeline Discord](https://discord.com/invite/VbCxtKN)
+
+
+## Feature requests
+
+Another great way to contribute is to propose new feature ideas. For that we use the
+Canny platform. It allows you to post new capabilities you would like to see into Kitsu or to vote 
+for already listed requests.
+
+[Post a feature request ](https://cgwire.canny.io/)
+
+
+## Bug reports
+
+If you find any issue with Kitsu 
+
+[Report a bug](https://github.com/cgwire/kitsu/issues)
+
+
+## Translations
+
+If you want to contribute to translations, we have an account on the POEditor platform that you can use to participate.
+
+[Contribute to the translation]([POEditor platform](https://poeditor.com/join/project?hash=fpUejpWDVo)
+
+
+## Improve the documentation
+
+You can contribute to the documentation of Kitsu by correcting sentences or adding information into it. Find below the list
+of the documentation repositories:
+
+* Kitsu: https://github.com/cgwire/kitsu/tree/docs
+* Zou: https://github.com/cgwire/zou/tree/docs
+* Gazu: https://github.com/cgwire/gazu/tree/docs
+
+
+## Code contributions
+
+Of course, we enjoy receiving code contributions. 
+All contributions are welcomed as long as they respect the [C4
+contract](https://rfc.zeromq.org/spec:42/C4). You can find tickets waiting for a fix on our Github repository and 
+feature requests on our Canny page.
+
+The Kitsu code is written with Javascript (ES6) and is based on the 
+[VueJS](https://vuejs.org/v2/guide/) framework extended with 
+the [Vuex](https://vuex.vuejs.org) plugin.
+
+To install the development environment, follow [the dedicated guide](https://kitsu.cg-wire.com/development-environment/).