JetBrains support for Open-Source Projects (#304)

Author: arey

README.md

@@ -283,3 +283,7 @@ For pull requests, editor preferences are available in the [editor config](.edit
 
 [Configuration repository]: https://github.com/spring-petclinic/spring-petclinic-microservices-config
 [Spring Boot Actuator Production Ready Metrics]: https://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-metrics.html
+
+## Supported by
+
+[![JetBrains logo](https://resources.jetbrains.com/storage/products/company/brand/logos/jetbrains.svg)](https://jb.gg/OpenSourceSupport)