feat: added readme.md

README.md

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+# simpledns
+
+A basic DNS server project in C for experimenting with DNS queries and responses.
+
+Currently, it only prints the DNS header of incoming queries. Future plans include implementing full DNS response capabilities.
+
+## Features
+
+- Listens for DNS queries
+- Parses and prints DNS header information
+- Planned support for answering queries
+
+## Requirements
+
+- GCC or Clang
+- Internet connection (optional, for future features)
+
+## Build Instructions
+
+```bash
+gcc -o dns dns.c
+```
+
+## Usage
+
+```bash
+./dns
+```
+
+The server will start and print DNS header information for each received query.
+
+## License
+
+Currently none