Hello @augustochaves,
First of all I apologies to reply several years later. I'm really new to Cloudron.
I've recently worked on this project, and I'm happy to share that you can find the integration on my GitHub project: https://github.com/dtromain/sonarqube-cloudron
This is my first application integration for Cloudron, and although I have successfully tested the Docker image on my side. I would really appreciate if someone can help me to test this new integration and implement missing features (unit tests, ldap integration). If you have any feedback, suggestions, or issues you encounter, feel free to share them 
Thanks in advance,
Romain