Update README.md

README.md

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 # Predator
 ## Next generation open source performance testing platform for APIs.
 [![Known Vulnerabilities](https://snyk.io/test/github/zooz/predator/badge.svg)](https://snyk.io/test/github/zooz/predator) [![Join the chat at https://gitter.im/predator-pf/community](https://badges.gitter.im/predator-pf/community.svg)](https://gitter.im/predator-pf/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/2786/badge)](https://bestpractices.coreinfrastructure.org/projects/2786)
 ![](https://zooz.github.io/predator/images/predator-screens.gif)