Deploy mastodon.nasqueron.org public directories

Summary:
The /support directory content lives in a specific repository.
This repo could welcome more directories in the future.

A new mastodon role has been created and assigned to Dwellers.

Content from rMP has been staged as 733b2c8001.

Test Plan: salt dwellers.nasqueron.org state.apply roles/mastodon

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D1053