mention that SSR is experimental and incomplete, prevent people from using it thinking it is ready for prime time

Author: trusktr

README.md

@@ -46,7 +46,7 @@
 - Multiple themes
 - Useful plugin API
 - Compatible with IE11
-- Support SSR ([example](https://github.com/docsifyjs/docsify-ssr-demo))
+- Experimental SSR support ([example](https://github.com/docsifyjs/docsify-ssr-demo))
 - Support embedded files
 
 ## Quick start

docs/ssr.md

@@ -1,10 +1,17 @@
 # Server-Side Rendering
 
+!> :construction: SSR support is experimental and incomplete. We are working on it. Plugins and
+some features of Docsify will not work in SSR mode yet. :construction:
+
+<!--
+This link is dead.
 See https://docsify.now.sh
+-->
 
-Repo in https://github.com/docsifyjs/docsify-ssr-demo
+Sample repo at https://github.com/docsifyjs/docsify-ssr-demo
 
 ## Why SSR?
+
 - Better SEO
 - Feeling cool