Update README.md with docker stats

README.md

@@ -12,6 +12,7 @@
 [![OWASP Production Project](https://img.shields.io/badge/OWASP-production%20project-48A646.svg)](https://owasp.org/projects/)
 [![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/7024/badge)](https://bestpractices.coreinfrastructure.org/projects/7024)
 [![Discussions](https://img.shields.io/github/discussions/OWASP/wrongsecrets)](https://github.com/OWASP/wrongsecrets/discussions)
+[![Docker pulls](https://img.shields.io/docker/pulls/jeroenwillemsen/wrongsecrets.svg)](https://hub.docker.com/r/jeroenwillemsen/wrongsecrets)
 
 Welcome to the OWASP WrongSecrets game! The game is packed with real life examples of how to _not_ store secrets in your software. Each of these examples is captured in a challenge, which you need to solve using various tools and techniques. Solving these challenges will help you recognize common mistakes & can help you to reflect on your own secrets management strategy.