Create SECURITY.md

Signed-off-by: Alex Richman <[email protected]>

Author: ARichman555

.github/SECURITY.md

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+## Reporting AWS Security Issues
+
+Amazon Web Services (AWS) is dedicated to the responsible disclosure of security vulnerabilities.  
+  
+We kindly ask that you **do not** open a public GitHub issue to report security concerns.  
+  
+Instead, please submit the issue to the AWS Vulnerability Disclosure Program via [HackerOne](https://hackerone.com/aws_vdp) or send your report via [email](mailto:[email protected]).  
+  
+For more details, visit the [AWS Vulnerability Reporting Page](http://aws.amazon.com/security/vulnerability-reporting/).  
+
+Thank you in advance for collaborating with us to help protect our customers.
+
+## Reporting cert-manager Security Issues
+
+If you believe you've found a security vulnerability in cert-manager, please refer to the [cert-manager organization security document](https://github.com/cert-manager/community/blob/main/SECURITY.md).