Update README.md

Added more description

README.md

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-# jugalbandi-api
-This repository is home of Jugalbandi APIs and associated components for organisations to build LLM applications on private documents.
+## Jugalbandi API
+
+Juglabnadi APIs is a system of APIs that allows users to build Q&A style applications on their private and public datasets. The system creates Open API 3.0 specification endpoints using FastAPI.
+
+---
+
+## How to use?
+
+To use Jugalbandi APIs you can follow below steps to get you started:
+
+1.  Visit [https://api.jugalbandi.ai/docs](https://api.jugalbandi.ai/docs). 
+2.  Scroll to `upload-file` endpoint to upload the document
+3.  Once you have uploaded file(s) you should have received a `uuid` number for that document set. Please keep this number handy as it will be required for you to query the document set.
+4.  Now that you have the `uuid`  you should scroll up to select the query endpoint you want to use. Currently there are three different implementations we support i.e. `query_using_gptindex`, `query_with_langchain` (recommended), `query_using_voice` (recommended for voice interfaces). While you can use any of the query systems, we are constantly refining our langchain implementation.
+5.  Pass on the `uuid` number and do the query.
+
+## Feature request and contribution
+
+*   We are currently in the alpha stage and hence need all the inputs, feedbacks and contributions we can.
+*   You should visit our project board to see what is it that we are prioritizing.