Create SECURITY.md

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+We take security seriously at Sonic and are committed to providing support for the latest stable version. You can check the current stable version at https://github.com/go-sonic/sonic/releases/latest.
+
+If you come across any security issues in the versions that have not been released yet, we would appreciate it if you could let us know. This way, we can fix the issues before the release.
+
+## Reporting a Vulnerability
+
+If you find a security vulnerability, please report it to us at https://github.com/go-sonic/sonic/security/advisories/new. You can also contact us directly at `jakezhu9@gmail.com`. We appreciate your help in keeping Sonic secure!