docs: add documentation about secret key generation

README.md

@@ -16,3 +16,13 @@ RailianceHosts is an open-source control repo that provisions and manages server
    ```
 
 See inline comments across the repo for details. Remember to **encrypt secrets** with SOPS before committing.
+
+## 🔑 Secrets Management
+
+This project uses [SOPS](https://github.com/getsops/sops) with [age](https://age-encryption.org) for secret encryption.  
+To set up your own key and configure SOPS, follow the guide here:
+
+➡️ [Managing Age Keys](docs/age-keys.md)
+
+
+