chore: add badges to readme (#27)

Signed-off-by: Miguel Martinez Trivino <miguel@chainloop.dev>

Author: migmartri

README.md

@@ -1,5 +1,10 @@
 # Chainloop
 
+[![Go Report Card](https://goreportcard.com/badge/github.com/chainloop-dev/chainloop)](https://goreportcard.com/report/github.com/chainloop-dev/chainloop)
+![Test passing](https://github.com/chainloop-dev/chainloop/actions/workflows/test.yml/badge.svg?branch=main)
+[![Chat on Discord](https://img.shields.io/discord/1037381970189111326?logo=discord)](https://discord.gg/f7atkaZact)
+[![License: Apache-2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/chainloop-dev/chainloop/blob/main/LICENSE.md)
+
 > Chainloop is under active development and you should expect breaking changes before the first stable release.
 > If you are interested in contributing, please take a look at our [contributor guide](./CONTRIBUTING.md).