docs: update readme

Author: filipslezaklab

README.md

@@ -1,6 +1,16 @@
-# YubiKey-Provision
+ <p align="center">
+    <img src="docs/header.png" alt="defguard">
+ </p>
+
 [Defguard](https://github.com/DefGuard/defguard) provisioning client for Yubikeys module.
 
+
+## Supported platforms
+
+- Linux
+- Windows
+- MacOS
+
 ## Prerequisites
 Machine using this service needs to have proper drivers/tools to detect and operate on smartcard's.
 While macOS and Windows should work without installing additional software, on Linux make sure your distribution has all the necessary tools to detect, read, and write on smartcard's.
@@ -24,3 +34,15 @@ This tool can also be used from a docker image like so:
 docker run --privileged ghcr.io/defguard/yubikey-provision:main -t <TOKEN> --id <ID> --grpc <DEFGUARD_GRPC_URL>
 ```
 Note that image is using elevated privileges to access host's USB by default but you can also try to configure it with **--device**.
+
+## Documentation
+
+See the [documentation](https://defguard.gitbook.io) for more information.
+
+## Community and Support
+
+Find us on Matrix: [#defguard:teonite.com](https://matrix.to/#/#defguard:teonite.com)
+
+## Contribution
+
+Please review the [Contributing guide](https://defguard.gitbook.io/defguard/for-developers/contributing) for information on how to get started contributing to the project. You might also find our [environment setup guide](https://defguard.gitbook.io/defguard/for-developers/dev-env-setup) handy.