chore(readme): Add disclaimer section (#64)

README.md

@@ -2,15 +2,28 @@
 
 ![build status](https://github.com/juanvqz/noko_cli/actions/workflows/main.yml/badge.svg)
 
+## Disclaimer
+
+- This gem was made for learning purposes.
+- This gem is WIP. Use it by your own risk, it should be safe though.
+
+## What NokoCli does?
+
+NokoCli is an easy way to manage your data in [Noko Time Tracking](https://nokotime.com/) via terminal.
+- Add entries
+- List entries
 
 ## Development
 
-To setup this repository you need to run `./bin/setup`
+To set up this repository you need to run
 
+```bash
+./bin/setup
+```
 
 ## Contributing
 
-Bug reports and pull requests are welcome on GitHub at https://github.com/juanvqz/noko_cli.
+Bug reports and pull requests are welcome on GitHub at [noko_cli](https://github.com/juanvqz/noko_cli).
 This project is intended to be a safe, welcoming space for collaboration,
 and contributors are expected to adhere to the [code of conduct](https://github.com/juanvqz/noko_cli/blob/master/CODE_OF_CONDUCT.md).