I have no previous experience in the "CII Best Practices Badge Program". I see they have some [criteria](https://github.com/coreinfrastructure/best-practices-badge/blob/master/doc/criteria.md) that has to be met for a project to "self-certify". I briefly looked at it and it seems that we are already passing all their tests. So if you @zafarella or somebody else want to work on this and get us the badge I'm ok with it.
Consider adding another badge
@iluwatar as this project is open-source, I was thinking why not add https://bestpractices.coreinfrastructure.org
as a badge. It will be like cool both standardization + learning for readers.
You have to create the project there and add the badge.

Others probably also can contribute whenever you create it.
> Just thought, please ignore if not relevant
README.md
README.md
diff --git a/README.md b/README.md
index 6eed9561b551..d7f2f154c781 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@
 [![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/LICENSE.md)
 [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Quality Gate](https://sonarqube.com/api/badges/gate?key=com.iluwatar%3Ajava-design-patterns)](https://sonarqube.com/dashboard/index/com.iluwatar%3Ajava-design-patterns)
+[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1503/badge)](https://bestpractices.coreinfrastructure.org/projects/1503)
 
 # Introduction
 
