README edit

Add live links to server

README.md

 The sources of the fields are:
 
 * **{{user}}** — One of the files at [static/users](static/users), describing current user.
-* **{{schema}}** — [static/chat.schema.json](static/chat.schema.json) (after dereference). Describing the syntax [and some semantics] of JSON replies we expect from the assistant.
+* **{{schema}}** — [static/chat.schema.json](static/chat.schema.json) (after dereference based on content of [static/media](static/media). See [here](http://localhost:5000/schema.json) while server is running). Describes the syntax and semantics of JSON replies we expect from the assistant.
 * **{{example}}** — [static/chat-example.json](static/chat-example.json)
 * **{{img_enum}}** — Available images (including text description). See [here](http://localhost:5000/enum/img) (while server is running)