Update README

README.md

@@ -1,18 +1,35 @@
 # Hostas
 
-To start your Phoenix server:
+Hostas is:
+- A swiss-army knife of indieweb & federation protocols
+- A headless CMS designed to invoke the same developer experience as building a website with a static site generator
 
-  * Run `mix setup` to install and setup dependencies
-  * Start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
+Hostas is very early in development and most of the core functionality has yet to be implemented. The long-term goal is for Hostas to offer optional, native support for a whole bunch of indieweb protocols (primarily ActivityPub and Webmentions, see the roadmap for details).
 
-Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
+## What is "SSG-style website construction?"
 
-Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+* Your unbuilt website is a directory of template files and subdirectories
+* Paths from the website's root directory are equivalent to how they're accessed when served (i.e. /path/to/page.eex becomes example.com/path/to/page.html)
+* Pages should be entirely static assets as much as possible in this context
 
-## Learn more
+## Roadmap
+Immediate-term goals:
+- Core functionality
+  * User authentication
+  * Content streams
+  * SSG-style website construction
+- The "hostapi" native API
 
-  * Official website: https://www.phoenixframework.org/
-  * Guides: https://hexdocs.pm/phoenix/overview.html
-  * Docs: https://hexdocs.pm/phoenix
-  * Forum: https://elixirforum.com/c/phoenix-forum
-  * Source: https://github.com/phoenixframework/phoenix
+Planned protocol support:
+- ActivityPub
+- Webmentions
+
+Possible support in the future:
+- OStatus
+- Zot
+- Diaspora
+
+Interfaces:
+- Mastodon API
+- Misskey and derivatives' API
+- Micropub & Microsub