Yep. If you have any feedback or want to contribute please join in. :) All our stuff is at http://github.com/owncloud
Yeah, we’re focused on Apache, but there’s documentation for Nginx and others at https://github.com/owncloud/documentation/blob/stable5/admin...
If you have improvements to the documentation, please contribute at https://github.com/owncloud/documentation/blob/stable5/admin...
Thank you!