Improvement: cloud functions to add user from @montpellier-techhub.org to admins #48
Description
When a new user register using it's montpellier-techhub.org, we should add him to admins.
TODO: this involve changing the deploy script as we'll need to deploy some serverless stuff at the same time
- Trigger a cloud function on user creating + update 'permissions' with the user if email valid. Help here
- figure out the deploy we need to do.