Update README.md to give more context about the dns server

README.md

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 [![Rust](https://github.com/bitsexplained/dns/actions/workflows/rust.yml/badge.svg)](https://github.com/bitsexplained/dns/actions/workflows/rust.yml)
 
 
-a dns implementation in rust
+# Simple DNS resolver in Rust
+This repository contains a simple DNS resolver written in Rust. It listens on port 2053 (standard DNS port) and forwards queries to a recursive resolver.
+
+# Prerequisites
+  1. Rust (stable version recommended) - (```rustc```)
+  2. Cargo package manager - (```cargo```)
+
+# Installation
+  1. Clone this repository: ```git clone https://github.com/bitsexplained/dns.git```
+  2. Navigate to the repository directory: ```cd dns```
+  3. Install dependencies: ```cargo build```
+
+# Additional notes:
+1. The server listens on port 2053 by default for incoming DNS queries.
+2. The server performs recursive lookups to resolve the hostname.
+3. The code uses the ```dns``` crate for parsing and generating DNS packets.
+4. The ```utils``` crate provides some utility functions used by the server.
+5. The ```buffer``` crate provides a buffer abstraction for handling byte data.
+
+
+# Further development:
+1. The server can be extended to support additional DNS record types.
+2. The server can be configured to use specific DNS servers for lookups.
+3. You can add logging and monitoring capabilities to the server.
+
+# Disclaimer:
+
+This is a basic DNS server implementation and may not be suitable for production use. It is intended for educational purposes and learning about DNS server implementation in Rust.