doc: update contributing

Author: Je

CONTRIBUTING.md

@@ -3,9 +3,11 @@
 Welcome, and thank you for taking time in contributing to Aleph.js!
 
 ## Code of Conduct
+
 All contributors are expected to follow our [Code of Conduct](CODE_OF_CONDUCT.md).
 
 ## Development Setup
+
 You will need [Deno](https://deno.land/) 1.4+ and [VS Code](https://code.visualstudio.com/) with [deno extension](https://marketplace.visualstudio.com/items?itemName=denoland.vscode-deno).
 
 1. Fork this repository to your own GitHub account.
@@ -18,7 +20,13 @@ deno run -A --unstable --importmap=import_map.json cli.ts ./examples/hello-world
 ```
 
 ## Testing
+
 Run all tests:
+
 ```bash
 deno test -A --unstable
 ```
+
+## Contributing to Documentation
+
+You are welcome to improve our documentation, the documentation repository is https://github.com/postui/alephjs.org/tree/master/pages/docs