Readme should point to the docs - single source of truth

Author: kiwicopple

README.md

@@ -6,14 +6,7 @@ A RESTful API for managing your Postgres. Fetch tables, add roles, and run queri
 
 Full documentation: https://supabase.github.io/pg-api/
 
-A trial API is set up here: https://pg-api.fly.dev/. To use this with your own Postgres database, pass a `pg` header. Example:
-
-```bash
-curl -X GET \
-  'https://pg-api.fly.dev/config/version' \
-  -H 'pg: { "password":"YOUR_PASSWORD", "host": "YOUR_DB_URL" } '
-```
-
+A trial API is set up here: https://pg-api.fly.dev/. To try this with your own Postgres database, read the [usage](https://supabase.github.io/pg-api/#usage) section in the docs.
 
 ## Quickstart
 
@@ -37,8 +30,6 @@ Then run any of the bin files in the `bin` directory
 ./bin/start-windows.exe
 ```
 
-Then you can call any of the following
-
 
 ## FAQs