Thanks guys for the suggestion, we can use Discourse Wikification feature which consists of
- Only Trust Level 2 (Regular user) user can open a new post into Howto section
- Only Admin can turn a post in a wiki
- Only Trust Level 1 (Basic User) can edit a wiki post
- Creator receives a notification when a wiki post is edited
See this example: Adagios installation on NethServer 6.x
What do you think?