add security back

Author: d80tb7

SECURITY.md

@@ -0,0 +1,9 @@
+# Private Vulnerability Reporting
+
+This project appreciates and encourages coordinated disclosure of security vulnerabilities. We prefer that you use the
+GitHub reporting mechanism to privately report vulnerabilities. Under the main repository's Security tab,
+click "*Report a vulnerability*" to open
+the [advisory form](https://github.com/armadaproject/armada/security/advisories/new).
+
+If you are unable to report it via GitHub, have received no response after repeated attempts, or have other security
+related questions, please contact [[email protected]](mailto:[email protected]) and mention Armada in the subject.