More fixes to docs

README.md

@@ -227,3 +227,18 @@ Optionally, you can specify a shade.
 tailwind(bg: color_scheme_token(:primary, 100))
 # => "bg-red-100"
 ```
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/guilherme-andrade/tailwindcss-rb.
+
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
+
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+