Suggestion to add Thundra test summary badge (#4604)

Author: rwxdash

README.md

@@ -1,6 +1,7 @@
 # Testcontainers
 
 [![Thundra Foresight](https://thundra-assets-prod.s3.us-west-2.amazonaws.com/images/badges/thundra-foresight-badge-enabled.svg)](https://foresight.thundra.live/testRuns/5a49cc30-f063-11eb-9a03-0242ac130003)
+[![Thundra Foresight Test Results](https://foresight.service.thundra.us/public/api/v1/badge/test/5a49cc30-f063-11eb-9a03-0242ac130003)](https://foresight.thundra.live/testRuns/5a49cc30-f063-11eb-9a03-0242ac130003)
 
 > Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.