add sonarcloud badges

Author: dominikzogg

README.md

@@ -4,6 +4,18 @@
 [![Coverage Status](https://coveralls.io/repos/github/chubbyphp/petstore/badge.svg?branch=slim)](https://coveralls.io/github/chubbyphp/petstore?branch=slim)
 [![Mutation testing badge](https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fchubbyphp%2Fpetstore%slim)](https://dashboard.stryker-mutator.io/reports/github.com/chubbyphp/petstore/slim)
 
+[![bugs](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=bugs)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![code_smells](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=code_smells)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![coverage](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=coverage)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![duplicated_lines_density](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=duplicated_lines_density)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![ncloc](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=ncloc)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![sqale_rating](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=sqale_rating)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![alert_status](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=alert_status)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![reliability_rating](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=reliability_rating)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![security_rating](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=security_rating)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![sqale_index](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=sqale_index)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+[![vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=chubbyphp_chubbyphp-petstore&metric=vulnerabilities)](https://sonarcloud.io/dashboard?id=chubbyphp_chubbyphp-petstore)
+
 ## Description
 
 A simple skeleton to build api's based on the [slim][1] framework.